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sac

sac

sac Sentence Examples

  • This sac has been already referred to as a coelomoduct.

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  • Levites, Prophet, Sac Rifice).

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  • Levites, Prophet, Sac Rifice).

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  • sp', Spermathecal sac involving the last.

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  • Thus, in Philaemon pungens (Lambert) it has the form of a large sac, into which open by a single orifice the conjoined oviducts.

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  • In Hyperiodrilus the whole spermatheca is thus included in a corresponding sac, which is of great extent.

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  • In the majority of the Megascolicidae each sac is provided with one or more diverticula, tubular or oval in form, of a slightly different histological character in the lining epithelium, and in them is invariably lodged the sperm.

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  • Carmen watched with excitement as the foal's feet could be seen inside a thin sac... first one and then the other.

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  • granting sac and soc and other privileges and right in the town.

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  • The larger renal sac (remarkably enough, that which is aborted in other FIG.

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  • It is surrounded by a ridge of cells which gradually extends over the visceral sac and secretes the shell.

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  • The Gastropoda are mainly characterized by a loss of symmetry, produced by torsion of the visceral sac. This torsion may be resolved into two successive movements.

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  • movement flexure is also produced by the coiling of the visceral sac and shell; primitively the latter was bowl-shaped; but the ventral flexure, which brings together the two extremities of the digestive tube, gives the visceral sac the outline of a more or less acute cone.

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  • Each renal organ is a sac lined with glandular epithelium (ciliated cell, with concretions) communicating with the exterior by its papilla, and by ce, Cerebral ganglia.

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  • movement flexure is also produced by the coiling of the visceral sac and shell; primitively the latter was bowl-shaped; but the ventral flexure, which brings together the two extremities of the digestive tube, gives the visceral sac the outline of a more or less acute cone.

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  • In the former, the duct, leading from the ovarian sac, and swelling along its course into the spherical sac, the "spermatheca," is highly suggestive of the oviduct and receptaculum of the Eudrilidae.

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  • sperm, spermatheca; sp. o, its external orifice; sp. sac, spermathecal sac; ov, sac containing ovary;.

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  • In this Annelid later the sac in question joins its fellow, passing beneath the nerve cord exactly as in the leech, and also grows out to reach the exterior.

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  • Strasser, " Luft sac ke der Vogel," Morph.

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  • r.o, egg sac; od, oviduct.

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  • The sole difference is therefore that in Eudrilus the ovarian sac gives rise to a tube which bifurcates, one branch meeting a corresponding branch of the other ovary of the pair, while the second branch reaches the exterior.

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  • Below the surface these walls are excavated with blood-vessels, so that the sac is practically a series of blood-vessels covered with renal epithelium, and forming 6 Cephalic tentacle.

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  • 12, and forms a large sac on half of the upper surface of the muscular mass of the foot.

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  • The odontophore is powerfully developed; the radular sac is extraordinarily long, lying coiled in a space between the mass of the liver and the muscular foot.

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  • To the left of the ctenidium a pulmonary sac, separated from it by an incomplete septum, am phibious.

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  • Visceral sac and shell coiled in one plane; foot divided transversely into two parts, posterior part bearing an operculum, anterior part forming a fin provided with a sucker.

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  • Visceral sac and shell small in proportion to the rest of the body, which cannot be withdrawn into the shell; foot elongated, fin-shaped, with sucker, but without operculum.

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  • b, Radular sac.

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  • m, The external opening of the renal sac.

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  • Q, Sac containing nutritive mb, Mantle-skirt.

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  • Close to them is the remarkable dart-sac ps, a thick-walled sac, in the lumen of which a crystalline four-fluted rod or dart consisting of carbonate of lime is found.

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  • In Clausilia, according to the observations of C. Gegenbaur, the primitive shell-sac does not flatten out and disappear, but takes the form of a flattened closed sac. Within this closed sac a plate of calcareous matter is developed, and after a time the upper wall of the sac disappears, and the calcareous plate continues to grow as the nucleus of the permanent shell.

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  • It is clear enough that the sac is of a different origin from that of Aplysia (described in the section treating of Opisthobranchia), being primitive instead of secondary.

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  • Whether the closed primitive shell-sac of the slugs (and with it the transient embryonic shell-gland of all other Mollusca) is precisely the same thing as the closed sac in which the calcareous pen or shell of the Cephalopod Sepia and its allies is formed, is a further question which we shall consider when dealing with the Cephalopoda.

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  • It is important here to note that Clausilia furnishes us with an exceptional instance of the continuity of the shell or secreted product of the primitive shell - sac with the adult shell.

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  • The mass of the arch-enteron or invaginated endodermal sac has taken on a bilobed form, and its cells are swollen (gs and tge).

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  • This bilobed sac becomes entirely the liver in the adult; the intestine and stomach are formed from the pedicle of invagination, whilst the pharynx, oesophagus and crop form from the stomodaeal invagination ph.

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  • 9, G) is conspicuous on either side of the first of this membrane delicate sac containing fluid, connected with which are the actual nerve-endings.

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  • of the families Belo- stomatidae, Nepidae, Corixidae and Hydrometridae have a pulsating sac at each knee-joint to assist the flow of blood through the legs, while in dragon-flies and locusts (Acridazdae) there is a ventral pulsating dia phragm, which forms the roof of a sinus enclosing the nerve-cords.

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  • Here the pits split into two, one part ending in a sac lined with sensory epithelium, and embedded in nervous tissue, the other projecting backwards as a long, glandular, blind canal.

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  • When mature, each sac pushes out a process to the exterior, and this forms the genital duct.

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  • The whole sac, with its epithelial wall and its contained genital cells, arises ultimately from some of the parenchymatous cells of the body.

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  • It consists of a definite contractile sac or sacs lying on the dorsal side of the alimentary canal near the oesophagus, and in preparations of Terebratulina made by quickly removing the viscera and examining them in sea-water under a microscope, he was able to count the pulsations, which followed one another at intervals of 30-40 seconds.

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  • Besides the four chief orders of friars there were the Crutched Friars in the parish of St Olave, Hart Street (about 1298), and the Friars of the Sac first outside Aldersgate (about 1257) and afterwards in the Old Jewry.

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  • But whilst in Trematoda a digestive sac is invariably present except in the sporocyst larval stage, the Cestodes possess no trace of this organ at any stage of their development.

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  • (From Lankester's Treatise on Zoology, part iv.) the base of the tail; nervous and muscular systems arise; and finally the rostellum and suckers become completely enclosed in the sac formed by the lateral extension of the " hind-body."

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  • A, Fasciola hepatica, from the ventral surface (X 2); the alimentary and nervous systems only shown on the left side of the figure, the excretory only on the right; a, right main branch of the intestine; c, a diverticulum; g, lateral ganglion; n, lateral nerve; o, mouth; p, pharynx; s, ventral sucker; cs, cirrus sac; d, left anterior dorsal excretory vessel; m, main vessel; v, left anterior ventral trunk; x, excretory pore.

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  • The digestive system consists of a simple or bifurcated sac, opening through the mouth by means of a "pharynx bulbosus," adapted to act primarily as a sucker, and secondarily, when drawing blood, as an aspirator.

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  • They ingest the mucus and, to some extent, the blood of their host by the aid of a sucking pharynx through which the food passes into the bifurcated alimentary sac and its branched caeca.

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  • The alimentary sac is simple elegans from the fins of and devoid of caeca.

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  • The intestinal sac has become bifid and is usually devoid of branches.

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  • The cilia are lost, the eye-spots disappear, the digestive sac vanishes and the larva becomes a sac or "sporocyst" full of germ-cells.

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  • it has a pharynx and short straight digestive sac: and its mesenchymatous cavities are filled with germ-balls in various stages of development.

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  • The exchange of fluid in the sac may well have a respiratory significance, in addition to its object of facilitating the movements of the tentacles.

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  • By Isolda, granddaughter of Robert de Cardinan, the town was given to Richard, king of the Romans, who in the third year of his reign granted to the burgesses a gild merchant sac and soc, toll, team and infangenethef, freedom from pontage, lastage, &c., throughout Cornwall, and exemption from the jurisdiction of the hundred and county courts, also a yearly fair and a weekly market.

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  • Their descendants styled themselves of Berkeley, and in 1200 the town was confirmed to Robert of Berkeley with toll, soc, sac, &c., and a market on whatever day of the week he chose to hold it.

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  • But in Tobit we find Asmodaeus the evil demon, TO 7rovrlpov Sac,uoviov, who strangles Sarah's husbands, and also a general reference to " a devil or evil spirit," 77/€144,a.

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  • On the other hand, the ejaculatory duct with its verticillate sac in the male of Cypris and other genera is a feature scarcely less remarkable.

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  • At its posterior margin the peritoneum of the great sac is reflected on to the diaphragm to form the anterior layer of the coronary ligament.

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  • To the left of the vena cava is the Spigelian lobe, which lies in front of the bodies of the tenth and eleventh thoracic vertebrae, the lesser sac of peritoneum, diaphragm and thoracic aorta intervening.

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  • Pore leading from the pericardium into the glandular sac of the left nephridium.

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  • nephridium, exposing the g, Non-glandular sac of the left glandular sac b, which is also nephridium.

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  • lar into the non-glandular D, Lateral view showing the sac of the left nephridium.

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  • actual relation of the glandu- k, Pore leading from the nonlar and non-glandular sacs of glandular sac to the exterior.

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  • Each nephridium in the oyster is a pyriform sac, which communicates by a narrow canal with the urino-genital groove placed to the front of the great adductor muscle; by a second narrow canal it communicates with the pericardium.

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  • From all parts of the pyriform sac narrow stalk-like tubes are given off, ending in abundant widely-spread branching glandular caeca, which form the essential renal secreting apparatus.

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  • (Modified from Horst.) A, Blastula stage (one-cell-layered eaten its way into the in sac), with commencing invaginated endodermal sac, vagination of the wall of the and the cells pushed in with sac at bl, the blastopore.

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  • The special gland of the musk-deer, which has made the animal so well known, and has proved the cause of unremitting persecution to its possessor, is found in the male only, and is a sac about the size of a small orange, situated beneath the skin of the abdomen, the orifice being immediately in front of the preputial aperture.

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  • Unlike the cells of Protozoa, these embryonic cells of the Metazoa do not remain each like its neighbour and capable of independent life, but proceed to arrange themselves into two layers, taking the form of a sac. The cavity of the two-cell-layered sac or diblastula thus formed is the primitive gut or arch-enteron.

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  • In the Coelentera, whatever subsequent changes of shape the little sac may undergo as it grows up to be polyp or jelly-fish, the original arch-enteron remains as the one cavity pervading all regions of the body.

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  • When this covering is complete the shell is contained in a closed sac and is said to be " internal," but the sac is lined by ectoderm and the shell is always morphologically external.

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  • By division of the egg-cell a mulberry-mass of embryonic-cells is formed (morula), which dilates, forming a one-celllayered sac (blastula).

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  • The orifice of invagination (blastopore) narrows, and we now have a two-cell-layered sac - the gastrula.

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  • Within this muscular tube lies a parenchymatous tissue which may be uniform (Cestodes) or differentiated into a central or digestive, and a peripheral portion (some Turbellaria), or finally the central portion becomes tubular and forms the digestive sac (Trematodes), while the peripheral portion is separated from it by a space lined in some forms by a flattened epithelium (most Planarians).

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  • It is characteristic of the group that the mouth should be the only means of ingress to and egress from the digestive sac and that no true perivisceral space or coelom exists in the sense in which these terms are used in higher Invertebrates.

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  • The study of Rhabdocoels (7) has led to the important discovery that the rudiment of the gonads and that of the pharynx are the first organs to appear, and that the alimentary sac arises independently of them.

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  • For the use of the oculist, who constantly employs this drug, it is also prepared in lamellae for insertion within the conjunctival sac. Each of these contains one-thousandth part of a grain of physostigmine sulphate, a quantity which is perfectly efficient.

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  • The stomach is formed upon much the same principle as that of the horse or rhinoceros, but is more elongated transversely and divided by a constriction into two cavities - a large left cul de sac, lined by a very dense white epithelium, and a right pyloric cavity, with a thick, soft, vascular lining.

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  • As in other molluscs the coelom is represented by a large pericardial cavity, situated above the intestine posteriorly, and a generative sac which is single and median and situated in front of the pericardium, except in the Nuttalochiton hyadesi, where the gonads are in a similar position, but are paired.

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  • Into the pharyngeal cavity open salivary glands and radular sac. The former are paired and ventral, and open on a subradular prominence.

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  • - Aplacophora without distinct ventral groove, with single median unisexual gonad, with differentiated hepatic sac, and with cloacal chamber furnished with two bipectinate gills.

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  • On this view then the Aplacophora are more primitive than the Polyplacophora in the relations of coelom, gonad and coelomoducts; and the genital ducts of the Chitons have arisen either by metameric repetition within the group, or by the gradual loss of an original connexion between the generative sac and the renal tube, as in Lamellibranchs and Gastropods, the generative sac acquiring a separate duct and opening to the exterior on each side.

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  • One surface of the tube is prolonged into a large sac lined with glandular excretory cells.

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  • The most valuable preparations of this potent drug are the liquor atropinae sulphatis, which is a 1% solution, and the lamella - for insertion within the conjunctival sac - which contains one five-thousandth part of a grain of the alkaloid.

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  • The development of the ovule, which represents the embryo- Gymnosperms; when mature it consists of one or two sac. coats surrounding the central nucellus, except at the apex where an opening, the micropyle, is left.

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  • The germination of the macrospore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac. One nucleus from each group, the polar nucleus, passes to the centre of the sac, where the two fuse to form the so-called definitive nucleus.

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  • Of the three cells at the micropylar end of the sac, all naked cells (the so-called egg-apparatus), one is the egg-cell or oosphere, the other two, which may be regarded as representing abortive egg-cells (in rare cases capable Of fertilization), are known as synergidae.

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  • If in its extension to contain the new formations within it the embryo-sac remains narrow, endosperm formation proceeds upon the lines of a cell-division, but in wide embryo-sacs the endosperm is first of all formed as a layer of naked cells around the wall of the sac, and only gradually acquires a pluricellular character, forming a tissue filling the sac. The function of the endosperm is primarily that of nourishing the embryo, and its basal position in the embryo-sac places it favourably for the absorption of food material entering the ovule.

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  • Sac. ii.

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  • The first part of the alimentary canal consists of the pharynx or branchial sac, the side walls of which are perforated by upwards of sixty pairs of elongated slits, the gill-clefts.

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  • The numerous small blisters or vesicles thus derived coalesce, forming a large sac full of "blister-fluid."

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  • Brown's views as to the structure of the unimpregnated ovule (with the introduction of the term "sac embryonnaire"); and in that it shows how nearly Brongniart anticipated Amici's subsequent (1846) discovery of the entrance of the pollen-tube into the micropyle, fertilizing the female cell which then develops into the embryo.

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  • a progressive abbreviation of the heart, with a diminution in the number of the ostia, can be traced, leading to the condition found in the closely related Cladocera, where the heart is a subglobular sac, with only a single pair of ostia.

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  • The sac is open to the exterior in most of the Macrura, but completely closed in the Brachyura.

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  • Where the sac is completely closed it generally contains no solid particles, but in a few Macrura a single otolith secreted by the walls of the sac is present.

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  • This buccal sac is provided with a dorsal mandible and a ventral radula.

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  • ra, Radular sac.

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  • The male organ (C) consists of a branched sac opening to the exterior on each side.

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  • By further growth this tissue gives rise to a proembryo, which consists, at the micropylar end, of a sac; the tissue at the chalazal end grows into a long and tangled suspensor, terminating in a mass of cells, which is eventually differentiated into a radicle, plumule and two cotyledons.

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  • The body may be roughly compared in structure to a sac, the wall of which is composed of two layers of cells.

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  • Each tentacle is to the stem of a plant, and is repre sented with the base of attachment a glove-finger like outpush uppermost; the mouth, not actually ing of the whole wall of the seen in the drawing, is at the lower sac and contains typically extremity of the body, surrounded a prolongation of its internal by the circle of tentacles.

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  • Scent-glands, Eec. - Besides the universally distributed sweatglands connected with the hair-system, most mammals have special glands in modified portions of the skin, often involuted to form a shallow recess or a deep sac with a narrow opening, situated in various parts of the surface of the body, and secreting odorous substances, by the aid of which individuals recognize one another.

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  • development, from the smallest bulging of a portion of the side-wall of the tube to a huge and complex sac, greatly exceeding in capacity the remainder of the alimentary canal.

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  • He renewed his attack in the following year (1832), but after several minor engagements, in most of which he was successful, he was defeated (21st of July) at Wisconsin Heights on the Wisconsin river, opposite Prairie du Sac, by Michigan volunteers under Colonels Henry Dodge and James D.

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  • In Scutigera there are seven unpaired dorsal stigmata, each leading into a sac whence a number of air-holding tubes project into the pericardial blood-sinus.

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  • The stomach of the horse is simple in its external form, with a largely developed right cul de sac, and is a good deal curved on itself, so that the cardiac and pyloric orifices are brought near together.

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  • It lies several miles off the road, now abandoned by wheeled traffic, between Changra and Amasia in a picturesque cul de sac amongst wooded hills, at the foot of a limestone rock crowned by the ruins of an ancient fortress now filled with houses (photograph in Anderson, Studia Pontica, p. 4).

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  • 29); of these the names of the following have survived: - (1) l spl 'wwv (mentioned in Or., 15); (2) IIepi Sac iovwv (mentioned in Or., 16); (3) Aoyos lrpos ran "EXXfvas; (4) Hpo 1 3X j .0 rwv f3c/3Xiov (Eus., v.

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  • The first is still limited to the single genus and species Proteolepas bivincta (Darwin), parasitic within the sac of another cirripede.

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  • Assoc. Report for 1887), has the body covered by two nearly circular valves instead of a sac. Petrarca bathyactidis, G.

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  • 707), is a multilobular sac, with apparently indistinct segmentation of the body proper on the dorsal side.

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  • In consequence of this peculiarity, climatic or orographic changes in Europe tend to drive animals and plants into a cul de sac, from which there is no escape; but in America similar climatic waves merely cause the species alternately to retreat and advance.

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  • (2) In a pouch (the produced vocal sac), by the male.-Rhinoderma.

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  • Carmen watched with excitement as the foal's feet could be seen inside a thin sac... first one and then the other.

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  • alter the fundamental composition of the SAC series.

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  • Any such changes are unlikely to significantly alter the fundamental composition of the SAC series.

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  • aneurysm sac during systole.

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  • One of these patients has a sac which has increased in size, the other 2 had distal implantation leaks at completion angiography.

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  • If the bleeding is not controlled with the clamp: compress the aorta with an aortic compressor in the lesser sac.

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  • Fungi with spores produced inside a sac called an ascus.

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  • You should now have a relatively bloodless field inside the aneurysm sac.

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  • bungalow on a quiet residential cul de sac situated above the busy seaside village of Saundersfoot.

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  • The joint is protected by a small sac of fluid called a bursa.

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  • When the condition called bursitis occurs, the slippery bursa sac becomes swollen and inflamed.

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  • As I recall this followed the threatened closure of the SAC Veterinary Science Division Center in Thurso.

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  • Expansion of the extra-embryonic coelom cavity allows the yolk sac and allantois to expand into the coelom cavity allows the yolk sac and allantois to expand into the coelom cavity from the gut of the embryo.

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  • Any such changes are unlikely to significantly alter the fundamental composition of the SAC series.

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  • Its budget is under extreme pressure, with the Scottish Executive proposing major cutbacks in its grant for SAC's education services.

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  • An ovarian cyst is a fluid filled sac which develops in an ovary.

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  • MATERIALS AND METHODS: Patients with epiphora and nasolacrimal duct or sac obstruction or stenosis were invited to participate.

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  • dural sac.

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  • In flowering plants, anther s produce pollen which contains male gametes, and the embryo sac within the ovary contains a female gamete.

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  • Does the human fetus temporarily develop gills, a tail, and a yolk sac?

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  • lacrimal sac confirms the diagnosis.

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  • The nasolacrimal duct connects the inferior end of the lacrimal sac to the inferior meatus of the nose.

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  • If there is no male the female mantid can still produce an egg sac by a process called parthenogenesis.

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  • Pollen sac ~ the bag that holds the pollen sac ~ the bag that holds the pollen at top of the filament.

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  • quiet cul - de - sac a few hundred yards from the village center.

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  • An ovarian cyst is a fluid filled sac which develops in an ovary.

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  • Crag The ultimate climbing sac, with all the essential features.

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  • Women's Antaeus 60 + 10 Backpacking sac featuring Biofit, an easily adjustable back system that allows one sac to fit all.

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  • Cyst A cyst is a fluid-filled sac or cavity in the body.

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  • A needle is inserted through the mother's abdominal wall into the amniotic sac holding the baby.

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  • An opening will be made in the pericardial sac.

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  • Ocular effects can result from entry of seeds into the conjunctival sac of farmers at harvest-time (Simmons 1957 ).

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  • A sticky, watery eye with positive regurgitation on pressure over the lacrimal sac confirms the diagnosis.

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  • sac location, the residents all benefit from use of communal garden.

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  • sac position with excellent open views to the front.

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  • On the highway issue the scheme would provide adequate on site car parking and a turning area at the cul-de sac for general use.

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  • Is yolk sac size in hatching fishes a good indicator of how long a fish can survive without food?

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  • A high velocity jet from the feeding artery enters the aneurysm sac during systole.

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  • pollen sac ~ the bag that holds the pollen at top of the filament.

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  • STINGS The stinging organ is usually left behind by the bee, along with the poison sac which continues to pump into the skin.

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  • sac in this popular village with good public transport links to Oxford.

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  • sac of fluid.

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  • sac for the adventure traveler or anyone who needs to transport kit from place to place.

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  • Site selection rationale The SAC series includes large sublittoral sandbanks showing good habitat structure and function.

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  • sandbank habitats already represented within the SAC series inshore.

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  • Site selection rationale The SAC series reflects the UK's special responsibilities for conserving montane willow scrub.

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  • They take the cataract out through a tiny slit at the edge of the sac that contains the clouded lens.

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  • The self expanding stent is anchored above and below the aneurysm excluding the sac from the circulation.

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  • teased apart to exclude the presence of an indirect sac.

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  • tote sac for easy carriage.

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  • An indirect sac should never be dissected distal to the pubic tubercle.

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  • I ran over and pulled the sac open, and found a bound, battered, incredibly hairy, but alive baby yeti.

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  • yolk sac size in hatching fishes a good indicator of how long a fish can survive without food?

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  • yolk sac tumor was characterized by a range of expression, which mirrored its morphologic variation.

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  • yolk sac infections.

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  • Cozy little hideout at the very zenith of the Cul de Sac building.

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  • granting sac and soc and other privileges and right in the town.

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  • From the Conquest or even earlier they had, besides various lesser rights - (1) exemption from tax and tallage; (2) soc and sac, or full cognizance of all criminal and civil cases within their liberties; (3) tol and team, or the right of receiving toll and the right of compelling the person in whose hands stolen property was found to name the person from whom he received it; (4) blodwit and fledwit, or the right to punish shedders of blood and those who were seized in an attempt to escape from justice; (5) pillory and tumbrel; (6) infangentheof and r L outfangentheof, or power to imprison and execute felons; (7) mundbryce (the breaking into or violation of a man's mund or property in order to erect banks or dikes as a defence against the sea); (8) waives and strays, or the right to appropriate lost property or cattle not claimed within a year and a day; (9) the right to seize all flotsam, jetsam, or ligan, or, in other words, whatever of value was cast ashore by the sea; (10) the privilege of being a gild with power to impose taxes for the common weal; and (11) the right of assembling in portmote or parliament at Shepway or Shepway Cross, a few miles west of Hythe (but afterwards at Dover), the parliament being empowered to make by-laws for the Cinque Ports, to regulate the Yarmouth fishery, to hear appeals from the local courts, and to give decision in all cases of treason, sedition, illegal coining or concealment of treasure trove.

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  • reduction in size is due to A, Two vermiform nuclei in the emthe absence of cytoplasm, bryo sac; one approaching the eggwhich is in some cases so nucleus, the other uniting with the 11 ~ ~h ~h upper polar nucleus.

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  • During the process of fertilization in the Angiosperms it has been shown by the researches of Nawaschin and Guignard that in Lilium and Fritillaria both generative nuclei enter the embryo sac, one fusing with the oosphere nucleus, the other with the polar nuclei (fig.

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  • Both nuclei are elongated vermiform structures, and as they enter the embryo sac present a twisted appearance like a spermatozoid without cilia (fig.

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  • Strasser, " Luft sac ke der Vogel," Morph.

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  • As an example of the former it has been shown (Beddard) that a large median sac in Lybiodrilus is at first freely open to the coelom, that it later becomes shut off from the same, that it then acquires an external orifice, and, finally, that it encloses the ovary or ovaries, between which and the exterior a passage is thus effected.

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  • In the majority of the Megascolicidae each sac is provided with one or more diverticula, tubular or oval in form, of a slightly different histological character in the lining epithelium, and in them is invariably lodged the sperm.

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  • In Heliodrilus the blind extremity of the spermatheca is enclosed in a coelomic sac which is in connexion with the sacs envolving the ovaries and oviducts.

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  • In Hyperiodrilus the whole spermatheca is thus included in a corresponding sac, which is of great extent.

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  • This sac has been already referred to as a coelomoduct.

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  • sperm, spermatheca; sp. o, its external orifice; sp. sac, spermathecal sac; ov, sac containing ovary;.

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  • r.o, egg sac; od, oviduct.

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  • sp', Spermathecal sac involving the last.

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  • r.o, Egg sac. od, Oviduct.

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  • Thus, in Philaemon pungens (Lambert) it has the form of a large sac, into which open by a single orifice the conjoined oviducts.

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  • Into each ovarian sac behind the transverse junction opens a slender tube, which is greatly coiled, and, in its turn, opens into a spherical "spermathecal sac."

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  • A stage exactly comparable to the stage in the leeches, where the ovary is surrounded by a closed sac, has been observed in Eudrilus.

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  • In this Annelid later the sac in question joins its fellow, passing beneath the nerve cord exactly as in the leech, and also grows out to reach the exterior.

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  • The sole difference is therefore that in Eudrilus the ovarian sac gives rise to a tube which bifurcates, one branch meeting a corresponding branch of the other ovary of the pair, while the second branch reaches the exterior.

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  • In the former, the duct, leading from the ovarian sac, and swelling along its course into the spherical sac, the "spermatheca," is highly suggestive of the oviduct and receptaculum of the Eudrilidae.

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  • The Gastropoda are mainly characterized by a loss of symmetry, produced by torsion of the visceral sac. This torsion may be resolved into two successive movements.

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  • Each renal organ is a sac lined with glandular epithelium (ciliated cell, with concretions) communicating with the exterior by its papilla, and by ce, Cerebral ganglia.

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  • Subsequent connected by nerve investigations carried on under the directo the streptoneur tion of the same naturalist have shown ous visceral loop. that the larger as well as the smaller renal sac is in communication with the pericardium.

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  • Below the surface these walls are excavated with blood-vessels, so that the sac is practically a series of blood-vessels covered with renal epithelium, and forming 6 Cephalic tentacle.

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  • The larger renal sac (remarkably enough, that which is aborted in other FIG.

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  • 12, and forms a large sac on half of the upper surface of the muscular mass of the foot.

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  • r, Lingual sac (radular sac).

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  • The odontophore is powerfully developed; the radular sac is extraordinarily long, lying coiled in a space between the mass of the liver and the muscular foot.

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  • i, Aperture connecting the small sac with the pericardium.

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  • k, Aperture connecting the large sac with the pericardium.

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  • Internally this glandular sac presents a second slit or aperture which leads into the pericardium (as is now found to be the case in all Mollusca).

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  • It is surrounded by a ridge of cells which gradually extends over the visceral sac and secretes the shell.

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  • To the left of the ctenidium a pulmonary sac, separated from it by an incomplete septum, am phibious.

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  • Visceral sac and shell coiled in one plane; foot divided transversely into two parts, posterior part bearing an operculum, anterior part forming a fin provided with a sucker.

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  • Visceral sac and shell small in proportion to the rest of the body, which cannot be withdrawn into the shell; foot elongated, fin-shaped, with sucker, but without operculum.

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  • b, Radular sac.

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  • 1, The renal sac (nephridium).

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  • l', The ciliated communication of the renal sac with the pericardium.

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  • m, The external opening of the renal sac.

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  • Outline of part of the renal sac (nephridium) below the surface.

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  • Q, Sac containing nutritive mb, Mantle-skirt.

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  • The ctenidium is atrophied, and the edge of the mantle-skirt is fused to the dorsal integument by concrescence, except at one point which forms the aperture of the mantle-chamber, thus converted into a nearly closed sac. Air is admitted to this sac for respiratory and hydrostatic purposes, and it thus becomes a lung.

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  • Soon after quitting the uterus it is joined by a long duct leading from a glandular sac, the spermatheca (Rf).

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  • In this duct and sac the spermatophores received in copulation from another snail are lodged.

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  • Close to them is the remarkable dart-sac ps, a thick-walled sac, in the lumen of which a crystalline four-fluted rod or dart consisting of carbonate of lime is found.

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  • In Clausilia, according to the observations of C. Gegenbaur, the primitive shell-sac does not flatten out and disappear, but takes the form of a flattened closed sac. Within this closed sac a plate of calcareous matter is developed, and after a time the upper wall of the sac disappears, and the calcareous plate continues to grow as the nucleus of the permanent shell.

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  • It is clear enough that the sac is of a different origin from that of Aplysia (described in the section treating of Opisthobranchia), being primitive instead of secondary.

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  • Whether the closed primitive shell-sac of the slugs (and with it the transient embryonic shell-gland of all other Mollusca) is precisely the same thing as the closed sac in which the calcareous pen or shell of the Cephalopod Sepia and its allies is formed, is a further question which we shall consider when dealing with the Cephalopoda.

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  • It is important here to note that Clausilia furnishes us with an exceptional instance of the continuity of the shell or secreted product of the primitive shell - sac with the adult shell.

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  • The mass of the arch-enteron or invaginated endodermal sac has taken on a bilobed form, and its cells are swollen (gs and tge).

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  • This bilobed sac becomes entirely the liver in the adult; the intestine and stomach are formed from the pedicle of invagination, whilst the pharynx, oesophagus and crop form from the stomodaeal invagination ph.

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  • 9, G) is conspicuous on either side of the first of this membrane delicate sac containing fluid, connected with which are the actual nerve-endings.

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  • of the families Belo- stomatidae, Nepidae, Corixidae and Hydrometridae have a pulsating sac at each knee-joint to assist the flow of blood through the legs, while in dragon-flies and locusts (Acridazdae) there is a ventral pulsating dia phragm, which forms the roof of a sinus enclosing the nerve-cords.

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  • Here the pits split into two, one part ending in a sac lined with sensory epithelium, and embedded in nervous tissue, the other projecting backwards as a long, glandular, blind canal.

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  • When mature, each sac pushes out a process to the exterior, and this forms the genital duct.

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  • The whole sac, with its epithelial wall and its contained genital cells, arises ultimately from some of the parenchymatous cells of the body.

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  • (From Burger.) i, Opening of proboscis; 2, cephalic glands running to frontal organ; 3, dorsal commissure of brain; 4, cerebral organ; 5, upper dorsal nerve; 6, under dorsal nerve; 7, rhynchocoelic blood-vessel; 8, fore-gut; 9, rhynchocoel; to, nerve to proboscis; 11, proboscis; 12, genital sac; 13, genital pore; 14, mid-gut; 15, circular nerves; 16, pore of excretory system; 17, lateral organ; 18, excretory canal; 19, lateral vessel; 20,.

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  • It consists of a definite contractile sac or sacs lying on the dorsal side of the alimentary canal near the oesophagus, and in preparations of Terebratulina made by quickly removing the viscera and examining them in sea-water under a microscope, he was able to count the pulsations, which followed one another at intervals of 30-40 seconds.

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  • Besides the four chief orders of friars there were the Crutched Friars in the parish of St Olave, Hart Street (about 1298), and the Friars of the Sac first outside Aldersgate (about 1257) and afterwards in the Old Jewry.

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  • But whilst in Trematoda a digestive sac is invariably present except in the sporocyst larval stage, the Cestodes possess no trace of this organ at any stage of their development.

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  • (From Lankester's Treatise on Zoology, part iv.) the base of the tail; nervous and muscular systems arise; and finally the rostellum and suckers become completely enclosed in the sac formed by the lateral extension of the " hind-body."

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  • Larval stage a multilocular sac (fig.

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  • A, Fasciola hepatica, from the ventral surface (X 2); the alimentary and nervous systems only shown on the left side of the figure, the excretory only on the right; a, right main branch of the intestine; c, a diverticulum; g, lateral ganglion; n, lateral nerve; o, mouth; p, pharynx; s, ventral sucker; cs, cirrus sac; d, left anterior dorsal excretory vessel; m, main vessel; v, left anterior ventral trunk; x, excretory pore.

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  • B, anterior portion more highly magnified (from Marshall and Hurst, after Sommer); cs, cirrus sac; d, ductus ejaculatorius; f, female aperture; o, ovary; od, oviduct; p, penis; s, shell-gland; t, anterior testis; u, uterus; va, vp, vasa deferentia; us, vesicula seminalis; y, yolk-gland; yd, its duct.

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  • C, genital sinus and neighbouring parts (from Sommer); a, ventral sucker; b, cirrus sac; c, genital pore; d, evaginated cirrus sac: e, end of vagina; f, vasa deferentia; g, vesicula seminalis; h, ductus ejaculatorius; i, accessory gland.

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  • The digestive system consists of a simple or bifurcated sac, opening through the mouth by means of a "pharynx bulbosus," adapted to act primarily as a sucker, and secondarily, when drawing blood, as an aspirator.

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  • The alimentary sac is simple elegans from the fins of and devoid of caeca.

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  • The intestinal sac has become bifid and is usually devoid of branches.

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  • c, Nearly ripe cercariae; cc, cystogenous cells; dr, daughter-redia; dt, limbs of the digestive tract; f, head-papilla; h, eye-spots; h', same degenerating; k', germinal cell; 1, cells of the anterior row; m, embryo in optical section, gastrula stage; n, pharynx of redia; o, digestive sac; oe, oesophagus.

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  • By Isolda, granddaughter of Robert de Cardinan, the town was given to Richard, king of the Romans, who in the third year of his reign granted to the burgesses a gild merchant sac and soc, toll, team and infangenethef, freedom from pontage, lastage, &c., throughout Cornwall, and exemption from the jurisdiction of the hundred and county courts, also a yearly fair and a weekly market.

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  • Their descendants styled themselves of Berkeley, and in 1200 the town was confirmed to Robert of Berkeley with toll, soc, sac, &c., and a market on whatever day of the week he chose to hold it.

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  • But in Tobit we find Asmodaeus the evil demon, TO 7rovrlpov Sac,uoviov, who strangles Sarah's husbands, and also a general reference to " a devil or evil spirit," 77/€144,a.

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  • On the other hand, the ejaculatory duct with its verticillate sac in the male of Cypris and other genera is a feature scarcely less remarkable.

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  • The statocyst (retro-cerebral organ of P. Marius de Beauchamp) is a sac filled with highly refractive granules soluble in dilute acids, and opening by a slender duct (or a pair) to the surface: its function is doubtless that of an organ of equilibrium, and it resembles in its opening to the surface the primitive internal ear of even Vertebrates, for the duct to the surface persists through life in the sharks.

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  • At its posterior margin the peritoneum of the great sac is reflected on to the diaphragm to form the anterior layer of the coronary ligament.

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  • To the left of the vena cava is the Spigelian lobe, which lies in front of the bodies of the tenth and eleventh thoracic vertebrae, the lesser sac of peritoneum, diaphragm and thoracic aorta intervening.

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  • Pore leading from the pericardium into the glandular sac of the left nephridium.

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  • the left side so as to open the f, Probe introduced into the left non-glandular sac of the reno-pericardial orifice.

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  • nephridium, exposing the g, Non-glandular sac of the left glandular sac b, which is also nephridium.

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  • cut into so as to show the h, Glandular sac of the left probe f.

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  • lar into the non-glandular D, Lateral view showing the sac of the left nephridium.

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  • actual relation of the glandu- k, Pore leading from the nonlar and non-glandular sacs of glandular sac to the exterior.

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  • Each nephridium in the oyster is a pyriform sac, which communicates by a narrow canal with the urino-genital groove placed to the front of the great adductor muscle; by a second narrow canal it communicates with the pericardium.

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  • From all parts of the pyriform sac narrow stalk-like tubes are given off, ending in abundant widely-spread branching glandular caeca, which form the essential renal secreting apparatus.

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  • (Modified from Horst.) A, Blastula stage (one-cell-layered eaten its way into the in sac), with commencing invaginated endodermal sac, vagination of the wall of the and the cells pushed in with sac at bl, the blastopore.

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  • The special gland of the musk-deer, which has made the animal so well known, and has proved the cause of unremitting persecution to its possessor, is found in the male only, and is a sac about the size of a small orange, situated beneath the skin of the abdomen, the orifice being immediately in front of the preputial aperture.

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  • The secretion with which the sac is filled is dark brown or chocolate in colour, and when fresh of the consistence of "moist gingerbread," but becoming dry and granular after keeping (see Musk).

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  • Unlike the cells of Protozoa, these embryonic cells of the Metazoa do not remain each like its neighbour and capable of independent life, but proceed to arrange themselves into two layers, taking the form of a sac. The cavity of the two-cell-layered sac or diblastula thus formed is the primitive gut or arch-enteron.

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  • In the Coelentera, whatever subsequent changes of shape the little sac may undergo as it grows up to be polyp or jelly-fish, the original arch-enteron remains as the one cavity pervading all regions of the body.

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  • When this covering is complete the shell is contained in a closed sac and is said to be " internal," but the sac is lined by ectoderm and the shell is always morphologically external.

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  • By division of the egg-cell a mulberry-mass of embryonic-cells is formed (morula), which dilates, forming a one-celllayered sac (blastula).

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  • The orifice of invagination (blastopore) narrows, and we now have a two-cell-layered sac - the gastrula.

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  • Within this muscular tube lies a parenchymatous tissue which may be uniform (Cestodes) or differentiated into a central or digestive, and a peripheral portion (some Turbellaria), or finally the central portion becomes tubular and forms the digestive sac (Trematodes), while the peripheral portion is separated from it by a space lined in some forms by a flattened epithelium (most Planarians).

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  • It is characteristic of the group that the mouth should be the only means of ingress to and egress from the digestive sac and that no true perivisceral space or coelom exists in the sense in which these terms are used in higher Invertebrates.

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  • The study of Rhabdocoels (7) has led to the important discovery that the rudiment of the gonads and that of the pharynx are the first organs to appear, and that the alimentary sac arises independently of them.

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  • This segregation of the germ cells and their independence of the intestinal sac is an indication that the origin of these cells is not coelomic nor enteric, and until we possess further information as to the evolution of the complex genitalia of the higher Turbellaria we cannot hope to understand the presence of such highly modified structures in animals of an otherwise low grade or organization.

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  • For the use of the oculist, who constantly employs this drug, it is also prepared in lamellae for insertion within the conjunctival sac. Each of these contains one-thousandth part of a grain of physostigmine sulphate, a quantity which is perfectly efficient.

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  • The stomach is formed upon much the same principle as that of the horse or rhinoceros, but is more elongated transversely and divided by a constriction into two cavities - a large left cul de sac, lined by a very dense white epithelium, and a right pyloric cavity, with a thick, soft, vascular lining.

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  • As in other molluscs the coelom is represented by a large pericardial cavity, situated above the intestine posteriorly, and a generative sac which is single and median and situated in front of the pericardium, except in the Nuttalochiton hyadesi, where the gonads are in a similar position, but are paired.

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  • Into the pharyngeal cavity open salivary glands and radular sac. The former are paired and ventral, and open on a subradular prominence.

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  • - Aplacophora without distinct ventral groove, with single median unisexual gonad, with differentiated hepatic sac, and with cloacal chamber furnished with two bipectinate gills.

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  • On this view then the Aplacophora are more primitive than the Polyplacophora in the relations of coelom, gonad and coelomoducts; and the genital ducts of the Chitons have arisen either by metameric repetition within the group, or by the gradual loss of an original connexion between the generative sac and the renal tube, as in Lamellibranchs and Gastropods, the generative sac acquiring a separate duct and opening to the exterior on each side.

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  • One surface of the tube is prolonged into a large sac lined with glandular excretory cells.

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  • The most valuable preparations of this potent drug are the liquor atropinae sulphatis, which is a 1% solution, and the lamella - for insertion within the conjunctival sac - which contains one five-thousandth part of a grain of the alkaloid.

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  • The development of the ovule, which represents the embryo- Gymnosperms; when mature it consists of one or two sac. coats surrounding the central nucellus, except at the apex where an opening, the micropyle, is left.

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  • The germination of the macrospore consists in the repeated division of its nucleus to form two groups of four, one group at each end of the embryo-sac. One nucleus from each group, the polar nucleus, passes to the centre of the sac, where the two fuse to form the so-called definitive nucleus.

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  • Of the three cells at the micropylar end of the sac, all naked cells (the so-called egg-apparatus), one is the egg-cell or oosphere, the other two, which may be regarded as representing abortive egg-cells (in rare cases capable Of fertilization), are known as synergidae.

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  • If in its extension to contain the new formations within it the embryo-sac remains narrow, endosperm formation proceeds upon the lines of a cell-division, but in wide embryo-sacs the endosperm is first of all formed as a layer of naked cells around the wall of the sac, and only gradually acquires a pluricellular character, forming a tissue filling the sac. The function of the endosperm is primarily that of nourishing the embryo, and its basal position in the embryo-sac places it favourably for the absorption of food material entering the ovule.

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  • Sac. ii.

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  • The first part of the alimentary canal consists of the pharynx or branchial sac, the side walls of which are perforated by upwards of sixty pairs of elongated slits, the gill-clefts.

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  • The numerous small blisters or vesicles thus derived coalesce, forming a large sac full of "blister-fluid."

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  • Brown's views as to the structure of the unimpregnated ovule (with the introduction of the term "sac embryonnaire"); and in that it shows how nearly Brongniart anticipated Amici's subsequent (1846) discovery of the entrance of the pollen-tube into the micropyle, fertilizing the female cell which then develops into the embryo.

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  • a progressive abbreviation of the heart, with a diminution in the number of the ostia, can be traced, leading to the condition found in the closely related Cladocera, where the heart is a subglobular sac, with only a single pair of ostia.

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  • The sac is open to the exterior in most of the Macrura, but completely closed in the Brachyura.

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  • Where the sac is completely closed it generally contains no solid particles, but in a few Macrura a single otolith secreted by the walls of the sac is present.

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  • This buccal sac is provided with a dorsal mandible and a ventral radula.

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  • ra, Radular sac.

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  • The male organ (C) consists of a branched sac opening to the exterior on each side.

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  • By further growth this tissue gives rise to a proembryo, which consists, at the micropylar end, of a sac; the tissue at the chalazal end grows into a long and tangled suspensor, terminating in a mass of cells, which is eventually differentiated into a radicle, plumule and two cotyledons.

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  • The body may be roughly compared in structure to a sac, the wall of which is composed of two layers of cells.

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  • Each tentacle is to the stem of a plant, and is repre sented with the base of attachment a glove-finger like outpush uppermost; the mouth, not actually ing of the whole wall of the seen in the drawing, is at the lower sac and contains typically extremity of the body, surrounded a prolongation of its internal by the circle of tentacles.

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  • Scent-glands, Eec. - Besides the universally distributed sweatglands connected with the hair-system, most mammals have special glands in modified portions of the skin, often involuted to form a shallow recess or a deep sac with a narrow opening, situated in various parts of the surface of the body, and secreting odorous substances, by the aid of which individuals recognize one another.

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  • development, from the smallest bulging of a portion of the side-wall of the tube to a huge and complex sac, greatly exceeding in capacity the remainder of the alimentary canal.

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  • "Mantle" is used in many transferred senses, all with the meaning of "covering," as in zoology, for an enclosing sac or integument; thus it is applied to the "tunic" or layer of connective-tissue forming the body-wall of ascidians enclosing muscle-fibres, blood-sinuses and nerves (see Tunicata).

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  • He renewed his attack in the following year (1832), but after several minor engagements, in most of which he was successful, he was defeated (21st of July) at Wisconsin Heights on the Wisconsin river, opposite Prairie du Sac, by Michigan volunteers under Colonels Henry Dodge and James D.

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  • In Scutigera there are seven unpaired dorsal stigmata, each leading into a sac whence a number of air-holding tubes project into the pericardial blood-sinus.

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  • At the metamorphosis, this sac is everted and the alimentary canal is drawn into it in the form of a loop (fig.

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  • The stomach of the horse is simple in its external form, with a largely developed right cul de sac, and is a good deal curved on itself, so that the cardiac and pyloric orifices are brought near together.

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  • It lies several miles off the road, now abandoned by wheeled traffic, between Changra and Amasia in a picturesque cul de sac amongst wooded hills, at the foot of a limestone rock crowned by the ruins of an ancient fortress now filled with houses (photograph in Anderson, Studia Pontica, p. 4).

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  • 29); of these the names of the following have survived: - (1) l spl 'wwv (mentioned in Or., 15); (2) IIepi Sac iovwv (mentioned in Or., 16); (3) Aoyos lrpos ran "EXXfvas; (4) Hpo 1 3X j .0 rwv f3c/3Xiov (Eus., v.

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  • The first is still limited to the single genus and species Proteolepas bivincta (Darwin), parasitic within the sac of another cirripede.

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  • Assoc. Report for 1887), has the body covered by two nearly circular valves instead of a sac. Petrarca bathyactidis, G.

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  • 707), is a multilobular sac, with apparently indistinct segmentation of the body proper on the dorsal side.

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  • In consequence of this peculiarity, climatic or orographic changes in Europe tend to drive animals and plants into a cul de sac, from which there is no escape; but in America similar climatic waves merely cause the species alternately to retreat and advance.

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  • (2) In a pouch (the produced vocal sac), by the male.-Rhinoderma.

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  • Windrush lies in a quiet cul - de - sac a few hundred yards from the village center.

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  • Crag The ultimate climbing sac, with all the essential features.

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  • Women 's Antaeus 60 + 10 Backpacking sac featuring Biofit, an easily adjustable back system that allows one sac to fit all.

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  • Cyst A cyst is a fluid-filled sac or cavity in the body.

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  • A needle is inserted through the mother 's abdominal wall into the amniotic sac holding the baby.

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  • An opening will be made in the pericardial sac.

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  • Ocular effects can result from entry of seeds into the conjunctival sac of farmers at harvest-time (Simmons 1957).

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  • The block is set behind a facade in a cul de sac location, the residents all benefit from use of communal garden.

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  • The property occupies a quiet cul de sac position with excellent open views to the front.

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  • On the highway issue the scheme would provide adequate on site car parking and a turning area at the cul-de sac for general use.

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  • Is yolk sac size in hatching fishes a good indicator of how long a fish can survive without food?

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  • STINGS The stinging organ is usually left behind by the bee, along with the poison sac which continues to pump into the skin.

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  • Set within a quiet cul de sac in this popular village with good public transport links to Oxford.

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  • By the sixth week of pregnancy the embryo is already encased in an amniotic sac of fluid.

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  • Mule 100 Large travel sac for the adventure traveler or anyone who needs to transport kit from place to place.

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  • Site selection rationale The SAC series includes large sublittoral sandbanks showing good habitat structure and function.

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  • They should complement the sandbank habitats already represented within the SAC series inshore.

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  • They take the cataract out through a tiny slit at the edge of the sac that contains the clouded lens.

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  • In most cases, dissecting behind the sac will expose the spermatic cord structures at the lowest point of dissection.

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  • The self expanding stent is anchored above and below the aneurysm excluding the sac from the circulation.

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  • Open the aneurysm sac and control the suprarenal aorta with a Foley catheter balloon.

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  • Its structures can be teased apart to exclude the presence of an indirect sac.

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  • Scrotum The wrinkled fleshy sac which holds the testicles in a man.

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  • Other features include a zip baffle and neat tote sac for easy carriage.

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  • I ran over and pulled the sac open, and found a bound, battered, incredibly hairy, but alive baby yeti.

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  • Yolk sac tumor was characterized by a range of expression, which mirrored its morphologic variation.

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  • Often young birds acquire the infections from the hen or through navel or yolk sac infections.

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  • Cozy little hideout at the very zenith of the Cul de Sac building.

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  • You have to make sure that the birth sac is removed, especially from the kitten's face.

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  • Like a wasp, which can sting repeatedly or a bumblebee that loses its sting and leaves a poison sac attached to your dog's nose if that is what happens to be out the window at the time.

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  • An average black and yellow garden spider will live only from the time they hatch within the egg sac until the first hard frost in the fall, often 12 months or less.

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  • While a female may bite to protect her egg sac, most of the time both sexes will simply drop to the ground and disappear when threatened.

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  • Yellow Sac Spider: The yellow sac spider is a small species, often as little as one quarter of an inch (0.5cm) long, with few distinguishing features.

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  • According to the University of Nebraska-Lincoln, scientists estimate that most bites attributed to the brown recluse spider are actually sac spider bites, as these are thought to be the most problematic biting spider on the continent.

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  • Sac Moda also has a Chanel No. 5 pendant for sale.

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  • After the tea ferments, the sac that forms on the top looks like a mushroom cap.

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  • The amniotic sac may or may not break during labor, and the birth attendant may rupture the bag with an amnio-hook, which looks a little like a large crochet hook.

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  • There are three signs that labor may be starting: rhythmical contractions of the uterus; leaking of the bag of waters (amniotic sac); and bloody show.

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  • Amniotic sac-The membranous sac that contains the fetus and the amniotic fluid during pregnancy.

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  • This test uses fluid collected from the sac around the fetus (amniotic fluid) instead of blood to detect the viral DNA.

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  • Bursitis-Inflammation of a bursa, a fluid-filled cavity or sac.

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  • Cyst-An abnormal sac or enclosed cavity in the body filled with liquid or partially solid material.

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  • Characteristically, with fraternal twins, each has its own placenta and amniotic sac.

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  • The placenta has one chorion and two amnions, so each twin has its own amniotic sac.

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  • Thirdly, monochorionic-monoamniotic twins are contained in the same amniotic sac.

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  • Since they share an amniotic sac, they have an increased risk of their umbilical cords becoming entangled or knotted.

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  • Amnion-Thin, tough, innermost layer of the amniotic sac.

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  • Amniotic membrane-The thin tissue that creates the walls of the amniotic sac.

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  • Chorion-The outer membrane of the amniotic sac.

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  • Emphysema-A chronic respiratory disease that involves the destruction of air sac walls to form abnormally large air sacs that have reduced gas exchange ability and that tend to retain air within the lungs.

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  • Pericarditis-Inflammation of the pericardium, the sac that surrounds the heart and the roots of the great blood vessels.

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  • The secondary closure may involve sewing a synthetic patch made of Dacron material over the opening, or wrapping the patient's own tissue (often from the fluid-filled sac around the heart called the pericardium) to close the opening.

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  • Amniotic sac-The membranous sac that contains the fetus and the amniotic fluid during pregnancy.

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  • Polyhydramnios-A condition in which there is too much fluid around the fetus in the amniotic sac.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • Once the uterus is opened, the amniotic sac is ruptured and the baby is delivered.

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  • In the case of early separation, the two fetuses either share an amniotic sac or each has a separate amniotic sac.

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  • If the fetuses share an amniotic sac, they also share a placenta.

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  • In this case, the twins share an amniotic sac and a placenta.

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  • A stinger that is stuck in the skin can be scraped off with a blade, fingernail, credit card, or piece of paper (using tweezers may push more venom out of the venom sac and into the wound).

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  • About 10 percent of fetuses with urinary tract obstructions may require prenatal surgery in which a device is placed in the fetus's bladder to drain the urine into the amniotic sac.

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  • TTTS may be treated by removing fluid from the overfilled recipient amniotic sac and placing it into the depleted sac of the pumping twin.

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  • The most common treatment for TTTS is amnioreduction in which a syringe through the mother's abdomen is used to remove amniotic fluid from the overfilled sac and place it in the sac of the other twin.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • Chorion-The outer membrane of the amniotic sac.

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  • Pancarditis is an inflammation that affects all aspects of the heart, including the lining of the heart (endocardium), the sac containing the heart (pericardium), and the heart muscle itself (myocardium).

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  • Pancarditis-Inflammation of the lining of the heart, the sac around the heart, and the muscle of the heart.

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  • Bladder-The muscular sac which receives urine from the kidneys, stores it, and ultimately works to remove it from the body during urination.

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  • Emphysema-A chronic respiratory disease that involves the destruction of air sac walls to form abnormally large air sacs that have reduced gas exchange ability and that tend to retain air within the lungs.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • Amniotomy-Rupturing or breaking the amniotic sac (bag of waters) to permit the release of fluid.

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  • Amniocentesis is a procedure that involves inserting a thin needle into the uterus, into the amniotic sac, and withdrawing a small amount of amniotic fluid.

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  • Cyst-An abnormal sac or enclosed cavity in the body filled with liquid or partially solid material.

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  • The word amniocentesis literally means "puncture of the amnion," the thin-walled sac of fluid in which a developing fetus is suspended during pregnancy.

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  • During the sampling procedure, the obstetrician inserts a very fine needle through the woman's abdomen into the uterus and amniotic sac and withdraws approximately one ounce of amniotic fluid for testing.

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  • Indirect inguinal hernia occurs when part of the bowel protrudes through the muscles of the groin into a sac left over from fetal development.

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  • During this process, in some fetuses, a small sac may form near the genitalia.

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  • Most often the opening to this sac, called the processus vaginalis, closes.

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  • However, in children with inguinal hernia, this sac remains patent, or open, becoming a container into which bowels may be herniated.

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  • If the hernia has already become incarcerated, the doctor will attempt to force the hernia out of the sac and back into the body manually.

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  • Research supported by the U.S. Public Health Service during the 1990s found that an inadequate diet during pregnancy was associated with premature rupture of amniotic sac membranes and premature birth.

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  • Pericarditis-Inflammation of the pericardium, the sac that surrounds the heart and the roots of the great blood vessels.

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  • Cyst-An abnormal sac or enclosed cavity in the body filled with liquid or partially solid material.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • The lungs continue to develop with the formation of air sac (alveoli); the eyes finish developing.

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  • Avoid squeezing the venom sac, as this can force more venom into the skin.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • In 85 to 90 percent of tracheoesophageal fistulas, the top part of the esophagus ends in a blind sac, and the lower part inserts into the trachea.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • Cyst-An abnormal sac or enclosed cavity in the body filled with liquid or partially solid material.

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  • Using ultrasound as a guide, the doctor uses the needle to withdraw a sample of fluid from the amniotic sac.

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  • They recover, but the infection can cause miscarriage, premature labor, early rupture of the birth sac, and stillbirth.

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  • Amniotic fluid-The liquid in the amniotic sac that cushions the fetus and regulates temperature in the placental environment.

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  • The procedure involves a long slim needle being passed through the abdomen of the pregnant woman to the uterus where amniotic fluid is carefully drawn from the amniotic sac.

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  • 'Internal Monitoring: Internal monitoring may only be used after the mother's amniotic sac has broken to avoid the risk of infection.

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  • The placenta is a sac filled with blood and other fluids.

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  • No. The baby is safely enclosed in your amniotic sac.

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  • Once the baby's location is determined, a long, thin needle is inserted into the abdomen and fluid from the amniotic sac is withdrawn.

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  • An amnio is performed by a trained physician who inserts a long needle in the abdomen and draws out some of the amniotic fluid that fills the sac.

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  • The needle extracts a small amount of amniotic fluid out of the sac surrounding the baby.

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  • The water in the amniotic sac is a protective substance that protects the baby from infection and it acts as a cushion to protect the baby from injury.

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  • The fluid-filled amniotic sac surrounding your baby will rupture before delivery.

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  • Once the amniotic sac has ruptured, there is a risk of infection if bacteria is introduced into the vagina.

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  • The amniotic sac is a protective barrier for the baby and delivery should occur shortly after the water breaks.

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  • If you want something different than the ordinary bookbag then the Louis Vuitton Sac Bosphore is the bag for you.

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  • reduction in size is due to A, Two vermiform nuclei in the emthe absence of cytoplasm, bryo sac; one approaching the eggwhich is in some cases so nucleus, the other uniting with the 11 ~ ~h ~h upper polar nucleus.

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  • As an example of the former it has been shown (Beddard) that a large median sac in Lybiodrilus is at first freely open to the coelom, that it later becomes shut off from the same, that it then acquires an external orifice, and, finally, that it encloses the ovary or ovaries, between which and the exterior a passage is thus effected.

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  • In such other genera of the family as have been examined, the true spermatheca has entirely disappeared, and the sac which contains it in Hyperiodrilus alone remains.

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  • Into each ovarian sac behind the transverse junction opens a slender tube, which is greatly coiled, and, in its turn, opens into a spherical "spermathecal sac."

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  • A stage exactly comparable to the stage in the leeches, where the ovary is surrounded by a closed sac, has been observed in Eudrilus.

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  • Subsequent connected by nerve investigations carried on under the directo the streptoneur tion of the same naturalist have shown ous visceral loop. that the larger as well as the smaller renal sac is in communication with the pericardium.

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  • l', The ciliated communication of the renal sac with the pericardium.

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  • Outline of part of the renal sac (nephridium) below the surface.

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  • Soon after quitting the uterus it is joined by a long duct leading from a glandular sac, the spermatheca (Rf).

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  • In such other genera of the family as have been examined, the true spermatheca has entirely disappeared, and the sac which contains it in Hyperiodrilus alone remains.

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  • They ingest the mucus and, to some extent, the blood of their host by the aid of a sucking pharynx through which the food passes into the bifurcated alimentary sac and its branched caeca.

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  • The cilia are lost, the eye-spots disappear, the digestive sac vanishes and the larva becomes a sac or "sporocyst" full of germ-cells.

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  • it has a pharynx and short straight digestive sac: and its mesenchymatous cavities are filled with germ-balls in various stages of development.

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  • The exchange of fluid in the sac may well have a respiratory significance, in addition to its object of facilitating the movements of the tentacles.

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  • In Heliodrilus the blind extremity of the spermatheca is enclosed in a coelomic sac which is in connexion with the sacs envolving the ovaries and oviducts.

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  • r.o, Egg sac. od, Oviduct.

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  • 1, The renal sac (nephridium).

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  • In this duct and sac the spermatophores received in copulation from another snail are lodged.

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