Ducts sentence example
We can hardly any longer hesitate to recognize in this vast building, with its winding corridors and subterranean ducts, the Labyrinth of later tradition; and as a matter of fact a maze pattern recalling the conventional representation of the Labyrinth in Greek art actually formed the decoration of one of the corridors of the palace.
In these and other Chaetopods the coelom is also put into indirect relations with the outside world by the nephridia and by the gonad ducts.
To this pericardial coelom is frequently added a gonocoel enclosing the gonads and the funnels of their ducts.
In Lumbricus the connexion is a little closer; the funnel of the nephridium, in the segments in which the funnels of the gonad ducts are to be developed, persists and is continuous with the gonad duct funnels on their first appearance.
To this category will belong the oviducts in Teleostean fishes and probably the gonad ducts in several groups of invertebrates.Advertisement
Nephridia sometimes of the type of those of the Oligochaeta; in other cases short, wide tubes with a large funnel serving also entirely or in part as gonad ducts.
It is possible that we have here gonad ducts distinct from nephridia which at the time of sexual maturity do open on to the exterior.
It seems that the posterior nephridia are mainly gonad ducts, and the gonads are developed in close association with the funnels.
It is noteworthy that in this family only among the Polychaeta, the nephridia are not restricted to a single pair in each segment; so that the older view that the gonad ducts are metamorphosed nephridia is not at variance with the anatomical facts which have been just stated.
The genital ducts are limited to one segment (the 8th in Capitella capitata), and there are genital setae on this and the next FIG.Advertisement
Special gonad ducts always present.
Male ducts often open on to exterior through a terminal chamber which is variously specialized, and sometimes with a penis.
A complex network, however, does occur in Lybiodrilus and certain other Eudrilidae, where the paired nephridia possess ducts leading to the exterior which ramify and anastomose on the thickness of the body wall.
The Oligochaeta contrast with the Polychaeta in the general presence of outgrowths of the septa in the genital segments, which are either close to, or actually involve, the gonads, and into which may also open the funnels of the gonad ducts.
These cavities communicate with the exterior through the gonad ducts, which have nothing to do with them, but whose coelomic funnels are taken up by them in the course of their growth.Advertisement
The gonad ducts are male and female, and open opposite to or, rarely, alongside of the gonads, whose products they convey to the exterior.
While the oviducts always open directly on to the exterior, it is the rule for the sperm ducts to open on to the exterior near to or through certain terminal chambers, which have been variously termed atrium and prostate, or spermiducal gland.
There are a clitellum and sperm ducts which though like nephridia have a larger funnel and a less complexly wound duct.
Spermatheca rarely with diverticula; sperm ducts as a rule occupying two segments only, usually opening by means of an atrium.
Sperm ducts and atria as in Limicolae; egg sacs large; body wall thick; vascular system and nephridia as in Terricolae.Advertisement
Sperm ducts traverse several segments on their way to exterior.
The intervening segments contain the genitalia, which are on the Oligochaeta plan in that the gonads are independent of their ducts and that there are special spermathecae, one pair.
The male ducts are either one pair or two pairs, which open by a common and complicated efferent terminal apparatus furnished with a protrusible penis.
The gonads and their ducts in the Hirudinea invariably form a closed system of cavities entirely shut off from the coelom in which they lie.
The efferent ducts are ciliated, and there is a patch of cilia at the point where they communicate with the cavity of each testis.Advertisement
It is therefore a haemocoel, the coelom of the developed insect being represented only by the cavities of the genital glands and their ducts.
So the Dermaptera, which retain distinct maxillulae and have no ectodermal genital ducts, have either specialized or aborted wings and a large number of Malpighian tubes.
To it belong (a) superficial grooves or deeper slits situated on the integument near the tip of the head, (b) nerve lobes in immediate connexion with the nervous tissue of the brain, and (c) ciliated ducts penetrating into the latter and communicating with the former.
There is no communication between the nephridia on one side and the other, but in Eupolia there are ducts opening into the alimentary canal as well as to the exterior, a condition of things which recalls what obtains in certain Oligochaetes.
Kaiser has described as kidneys two organs something like minute shrubs situated dorsally to the generative ducts into which they open.
Both male and female gonads consist of more or less lobulated hollow sacs connected with the epidermis by short ducts.
When they are arranged in uniserial or biserial rows the genital ducts open into or near the branchial grooves in the region of the pharynx and in a corresponding position in the post-branchial region.
The latter enlarges into a spherical stomach into which open the broad ducts of the so-called liver.
They are lined by cells charged with a yellow or brown pigment, and besides their excretory functions they act as ducts through which the reproductive cells leave the body.
The first pair of foliaceous appendages in each animal is the genital operculum; beneath it are found the openings of the genital ducts.
The genital ducts of Arthropoda are, like the green glands, shell glands and coxal glands, to be regarded as coelomoducts (gonocoels).
The only point in which the gut of Limulus resembles that of Scorpio rather than that of any of the Crustacea, is in possessing more than a single pair of ducts or lateral outgrowths connected with ramified gastric glands or gastric caeca.
Both male and female gonoducts open through acornmon atrium to the exterior by tkis pore, but in three bisexual genera the male and female ducts are developed in separate individuals (Bilharzia, Didymozoon, Koellikeria).
The former consist of one pair or more of vesicular testes communicating by fine ducts with a vesicula seminalis.
The female organs consist of distinct ovaries and yolk-glands, the ducts of which uniti.
Coincidently, to allow of fertilization and the escape of excess of yolk, and of spermatozoa, other accessory ducts open at this point.
The excretory system is highly developed; the larger collecting ducts are elaborately looped and open posteriorly by a single terminal aperture.
It has been shown that this parasite feeds upon the blood, not the bile of its host, though it occurs mainly in the bile ducts.
Reproductive organs with ducts leading to the vestibule.
Francis died on the 31st of March 1547, of a disease of the urinary ducts according to some accounts, of syphilis according to others.
The mouth, situated at the opposite end and armed with a pair of stylets, leads into an oesophagus, into which the ducts of a pair of so-called salivary glands open.
This fissure represents the hilum of the liver, and contains the right and left hepatic ducts and the right and left branches of the hepatic artery and portal vein, together with nerves and lymphatics, the whole being enclosed in some condensed subperitoneal tissue known as Glisson's capsule.
The right and left hepatic ducts, while still in the transverse fissure, unite into a single duct which joins the cystic duct from the gall bladder at an acute angle.
The same description applies to the reptiles, but a curious net work of cystic ducts is found in snakes and to a less extent in crocodiles.
A pair of genital apertures, connected by genital ducts with the paired gonads, are found right and left near the nephridial pores, except in a few cases where the genital duct joins that of the renal organ (Spondylus).
A pair of ducts (ai) lead from the first enlargement of the alimentary tract called stomach into a pair of large digestive glands, the socalled liver, the branches of which are closely packed in this region (af).
The next stage of modification is seen in Ostraea, Cyclas and some Lucinidae, in which the generative and renal ducts FIG.
The May-flies are remarkably primitive in certain of their characters, notably the elongate cerci, the paired, entirely mesodermal genital ducts, and the occurrence of an ecdysis after the acquisition of functional wings.
The glands of Bartholin are two oval bodies about half an inch long, lying on each side of the vagina close to its opening; they represent Cowper's glands in the male, and their ducts open by minute orifices between the hymen and the labia minora.
The early history of these ducts is indicated in the article on the Urinary System.
Microscopically the prostate consists of masses of long, slender, slightly branching glands, embedded in unstriped muscle and fibrous tissue; these glands open by delicate ducts (about twenty in number) into the prostatic urethra, which will be.
When it is slit open from in front a longitudinal ridge is seen in its posterior wall, which is called the verumontanum or crista urethra, and on each side of this is a longitudinal depression, the prostatic sinus, into which numerous ducts of the prostate open, though some of them open on to the antero-lateral surface.
Close to the opening of the utriculus the ejaculatory ducts, already mentioned, open into the urethra by very small apertures.
The part of the urethra above the openings of these ducts really belongs to the urinary system only, though it is convenient to describe it here.
Opening into the spongy urethra where it passes through the bulb are the ducts of two small glands known as Cowper's glands, which lie on each side of the membranous urethra and are best seen in childhood.
True nephridia do not primarily open into the coelom, as was formerly taught, but are intra-cellular ducts in the mesoderm.
The coelom opens to the exterior by ducts which are primarily genital ducts by which the ova or sperms are discharged.
These ducts, however, as well as the coelomic epithelium, may assume excretory functions.
There is usually one pair of coelomic ducts leading from the pericardium to the exterior, and these are the excretory organs or kidneys, formerly known as the organs of Bojanus.
In the majority of Mollusca the gonads are provided with a pair of ducts of their own.
There are thus two pairs of coelomic ducts.
In animals which exhibit typical segmentation or metamerism, such as segmented worms (Chaetopoda), each segment or metamere possesses its own coelomic cavity, a pair of coelomic ducts, and a pair of nephridia.
The structure of the Mollusca in the greater number of cases agrees with the hypothesis that the primitive form was unsegmented, and therefore had but one pair of coelomic ducts and one pair of nephridia.
In the most primitive forms of several classes there are no distinct genital ducts, the gonads when mature discharging into or through the kidneys.
Among the Lamellibranchia again the kidneys serve as genital ducts in the Protobranchia and some Filibranchia.
Among the Amphineura we find one pair of coelomic ducts in the Aplacophora, two pairs in the Chitons.
In the former the genital coelom and the pericardial coelom are continuous and the reproductive cells escape by the renal ducts.
In the Chitons or Polyplacophora, on the other hand, the two cavities are separate, and there are independent genital ducts.
It is possible therefore to regard the latter condition as secondary, and to conclude that the separate genital ducts have been derived from the original single pair of coelomic ducts, as in Lamellibranchs.
Assuming that these ancestral forms resembled the existing Nautilus in their internal anatomy, they had two pairs of renal ducts and one pair of genital ducts, which would apparently indicate, not a single metamere or unsegmented body, but three metameres.
The Dibranchia, with only one pair of branchiae, one pair of renal organs, and one pair of genital ducts, are much more recent, not appearing till the end of the Secondary epoch, and therefore must be regarded as descended from the Tetrabranchia.
In the Dibranchia true nephridia have not been detected in the embryo, nor has it been shown that the genital ducts are derived from the renal tubes.
On the whole, then, the most probable conclusion is that the original ancestral form of the Mollusca was unsegmented, possessed one pair of true nephridia, and one pair of coelomic ducts whose function was to conduct the generative products to the exterior.
The yolk prepared by the latter is conducted by one or more specialized ducts to the oviduct and the point of union is distinguished by the opening of a " shell-gland " which secretes a membrane around the conjoined mass of ovum and yolk.
Meinert, open to the exterior by a median aperture, the terminal part of the duct being single, either by the fusion of the primitive paired ducts or by the suppression of one of them.
Thus the condition in the Dermaptera is more primitive than in any other Pterygote order except the Ephemeroptera (Mayflies) which are still more generalized, the primitive mesodermal ducts (oviducts and vasa deferentia) opening by paired apertures as in the Crustacea.
The coelom differs from that of the Chitons in the fact that the cavities of the genital organs are continuous with it, and in the fact that there is only one pair of coelomoducts resembling the renal organs of Chitons, but serving also as genital ducts.
There is a heart in the pericardium consisting of a median ventricle attached, except in Neomenia, to the dorsal wall of the pericardium, and in Neomenia a pair of auricular ducts returning blood from the gills to the ventricle.
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.
In Dinophilus there is also only a single pair of genital ducts behind; and in the male there are sperm-sacs and a median penis.
It ducts of is not so used in Afghanistan, but the Seistan people eat value.
Willem it appears that the viscid fluid which causes the adherence of the ventral tube is secreted by a pair of glands in the head whose ducts open into a superficial groove leading from the second maxillae backward to the tube on the first abdominal segment.
But it seems now probable that all glands which have what may be termed an external secretion like the pancreas, stomach, intestine, skin and kidneys have also an internal secretion, so that while they are pouring out one secretion from the ducts into the intestine or external air, they are also pouring into the lymphatics, and thus into the blood, an internal secretion.
They serve probably for the aeration of the gonads by admitting to their vicinit y water with its dissolved oxygen; they never serve as genital ducts, since the generative products are always dehisced into the stomach and pass out by the mouth.
The gonads, as in other Arthropoda, are hollow saccular organs, the cavity communicating with the efferent ducts.
The ducts are present only as a single pair, except in one genus of parasitic Isopoda (Hemioniscus), where two pairs of oviducts are found.
Various accessory structures may be connected with the efferent ducts in both sexes.
The male ducts often have glandular walls, secreting capsules or spermatophores within which the spermatozoa are packed for transference to the female.
The terminal part of the male ducts may be protrusible and act as an intromittent organ, or this function may be discharged by some of the appendages, as, for instance, in the Brachyura.
The stomach is small; into it open a small pyloric caecum and the ducts of the liver, paired in Dentaliidae, one on the left only in Siphonodentalium.
They hold water like a sponge, but part with it under pressure to fissures by which they are intersected, and, in the case of the Upper Chalk, to ducts following beds of flints.
The middle cavities were smaller, and the ducts from them came to unite with those from the anterior cavities, and no longer opened directly to the exterior; whether these cavities were already specialized as water-sacs cannot be asserted, but they certainly had become so at a slightly later stage.
It is a noteworthy fact that other tubes in these same terrestrial Arthropoda - namely, the ducts of glands - are similarly strengthened by a chitinous cuticle, and that a spiral or annular thickening of the cuticle is developed in them also.
The genital ducts open in the fourth, or between the fourth and fifth post-oral somite.
The genital ducts open on the penultimate somite.
The upper ones are the largest, and are continuous anteriorly with the labial glands, the ducts of which open on the mucous membrane of the upper lip.
The eye is provided with a nictitating membrane or third eyelid, at the base of which open the ducts of the Harderian gland.
In all the species except the African species there is a globular receptaculum seminis opening by two short ducts close together into the oviduct, and in the neotropical species there is in addition a small receptaculum ovorum, with extremely thin walls, opening into the oviduct by a short duct just in front of the receptaculum seminis.
Besides the other spaces are definite rounded or oval vacuoles with a permanent pellicular wall termed by Schutt " pusules "; these open by a duct or ducts into the longitudinal groove.
With what is termed the air circulation system the air is generally circulated by means of a fan, being drawn from the rooms through ducts, passed over a cooler, and returned again to the rooms by other ducts.
The air cooler is placed at the end, and the air is distributed by means of wood ducts furnished with slides for regulating the temperature of the rooms, which are insulated according to the method shown in fig.
Many of the Ecaudata have remnants of oviducts, or Miillerian ducts, most developed in Bufo, which genus is also remarkable as possessing a problematic organ, Bidder's organ, situated between the testis and the adipose or fat-bodies that surmount it.
In biliary atresia, the bile ducts are actually absent, also causing jaundice.
They are designed to add mass and reduce noise breakout from pipes, ducts and other equipment.
Vertical ducts should be fitted with a condensation trap and a weather proof cowl of sufficient free area for the air volume.
They run down tiny tear ducts into the nose.
Widening of the airways increases the anatomical dead space, together with increase in the size of the alveolar ducts.
The salivary glands create saliva, which is then secreted into your mouth via the salivary ducts.
The Liver and Biliary Tract The biliary tract contains the right and left hepatic ducts, which meet to form the common hepatic duct.
My ventilation ducts will be too small to crawl through.
Once you have had lymph glands removed, or have developed damage to the lymph ducts, this cannot be put right.
He'd already proved his tear ducts were in good working order at the Versace funeral.
This image opposite is of ducts in the kidney, which are lined by simple cuboidal epithelium.
Vane anemometers or heated head air meters may be used to measure air flow in ducts.
It should be avoided by people with chronic heartburn, severe liver damage, inflammation of the gallbladder, or obstruction of bile ducts.
Branches within the primary lobule give rise to alveolar ducts, which in turn give off alveoli.
The disease begins when cells in the breast ducts, or sometimes the breast lobules, start to divide more often than they should.
The form originating from collecting ducts is highly infrequent and very malignant with the five-year survival in 20% only.
We can fit acoustic foam and custom metalwork, to create ducts which guide the air around the case.
The traction motors were air-cooled from ducts positioned well above rail level to avoid the ingress of brake dust into the motors.
This blocks the sweat ducts, by forming a gel which prevents perspiration.
The salivary glands create saliva, which is then secreted into your mouth via the salivary glands create saliva, which is then secreted into your mouth via the salivary ducts.
Composition and manufacture All Multivent models are fitted with four extract 125 or 100mm diameter spigots, allowing quick connection to ducts.
When the bile ducts can get swollen the bile cannot get to the gall bladder.
The square air ducts ahead of each engine feature variable geometry vanes.
Sometimes the amber retains the form of drops and stalactites, just as it exuded from the ducts and receptacles of the injured trees.
Finally, he saw the spores accumulate within the cells of the salivary glands, and discovered that they actually passed down the salivary ducts and along the grooved hypopharynx into the seat of puncture, thus causing infection in a fresh vertebrate host" (Sambon).
In its earlier conception, this view embraced as homologous organs (so far as the present group is concerned) not only the nephridia of Oligochaeta and Hirudinea, which are obviously closely similar, but the wide tubes with an intercellular lumen and large funnels of certain Polychaeta, and (though with less assurance) the gonad ducts in Oligochaeta and Hirudinea.
The function of nitrogenous excretion was not therefore a necessary part of the view - though it may be pointed out that there are grounds for believing that the gonad ducts are to some extent also organs of excretion (see below).
It is therefore by no means certain that so profound a difference embryologically can be asserted to exist between the excretory nephridia and the ducts leading from the coelom to the exterior, which are usually associated with the extrusion of the genital products among the Chaetopoda.
In this category are included (by Goodrich and Lankester) the gonad ducts of the Oligochaeta, certain funnels without any aperture to the exterior that have been detected in Nereis, &c., funnels with wide and short ducts attached to nephridia in other Polychaeta, gonad ducts in the Capitellidae, the gonad ducts of the leeches.
The gonad ducts of Lumbricus, &c., must perform one function of nephridia; they must convey to the exterior some of the coelomic fluid with its disintegrated products of waste.
It has been shown that in Tubifex, and some other aquatic Oligochaeta, the genital segments are at first provided with nephridia, and that these disappear on the appearance of the generative ducts, which are coelomoducts.
It might be well to term these structures, mostly serving as gonad ducts, which have an undoubted resemblance to nephridia, and for the most part an undoubted connexion with nephridia, "Nephro dinia," to distinguish them from another category of "ducts" which are communications between the coelom and the exterior,.
Among the Capitellidae, which in several respects resemble the Oligochaeta, wide and short gonad ducts coexist in the same segments with nephridia, the latter being narrower and longer.
There are no renal organs with a wide intercellular lumen, such as occur in the Polychaeta, nor is there ever any permanent association between nephridia and ducts connected with the evacuation of the generative products, such as occur in Alciope, Saccocirrus, &c. In these points the Oligochaeta agree with the Hirudinea.
A crop-like dilatation of the gut and a recurved intestine, embedded in the compact yellowish-brown liver, the ducts of which open into it, form the rest of the digestive tract and occupy a large bulk of the visceral hump. The buccal region presents a pair of shelly jaws placed laterally upon the lips, and a wide range of variation in the form of the denticles of the lingual ribbon or radula.
Shell external, spiral, generally ornamented with ribs; borders of aperture thin and not reflected; radula with square teeth; genital ducts without accessory organs.
As regards wing-structure, the Isoptera with the two pairs closely similar are the most primitive of all winged insects; while in the paired mesodermal genital ducts, the elongate cerci and the conspicuous maxillulae of their larvae the Ephemeroptera retain notable ancestral characters.
In addition, some show duplication of the gonads and of their ducts, so that we find both transverse and longitudinal repetition of these organs, without corresponding multiplication of the nervous ganglia mesenchyma, or excretory opening.
In the third generation Caspar Thomeson (1655-1738), son of Thomas, also taught anatomy at Copenhagen, his name being associated with the description of one of the ducts of the sublingual gland and of the glandulae Bartholini, while his younger brother, Thomas (16J9-1690), was a student of northern antiquities who published Antiquitatum Danicarum libri tres in 1689.
Where the vesiculae join the ampullae of the vasa deferentia the ejaculatory ducts are formed; these are narrow and thin-walled, and run, side by side, through the prostate to open into the floor of the prostatic urethra.
The sublingual is represented by a mass of glands lying just beneath the mucous membrane of the floor of the mouth on the side of the tongue, causing a distinct ridge, extending from the fraenum backwards, the numerous ducts opening separately along the summit of the ridge.
Striated ducts - ducts which carry saliva from the intercalated ducts to a series of main collecting ducts.
Each of the ducts has a pair of servo tabs that works in a similar manner to the thrust reversers on jet engines.
You don't want to wear anything that might cause clogged milk ducts, which can cause you discomfort!
We also recommend vacuuming all air ducts and changing filters in air conditioners and furnaces.
Also, mothers who have a tendency towards plugged ducts and mastitis infections may want to forgo the underwire styles which can only exacerbate such problems.
Many women refuse to give up their underwire features when purchasing a nursing bra, and while you can still buy underwear bras, be sure they fit appropriately to avoid placing pressure on the breasts' milk ducts.
Moreover, when a mother undertakes the task of breastfeeding, she needs to be concerned with the health and flow of her milk ducts.
Some mothers are more prone to plugged ducts and mastitis infections than others.
Moreover, a sports bra that is designed with the intent to lock the breasts in by applying pressure to the chest area may also aggravate or even induce conditions such as plugged ducts or mastitis.
Wire-free designs-While bras are created to provide comfort, support, and style, they do not contain wires, which can impede milk production and clog milk ducts.
Is snug at the bottom but does not put excessive pressure on the breasts which can cause problems with plugged ducts.
A traditionally-built home loses 15 to 20 percent of its heat or air-conditioning from leakage in the ducts alone.
However, ducts and fans may be used to help out.
Latching problems, sore nipples, and plugged ducts are among the most common woes, but a major concern that can occur right from the start is the problem of low milk supply.
Getting your air ducts professionally cleaned will be a huge selling point to potential buyers.
I then proceed to line the bottom lashes, including my lower inner rim (the part closest to the whites of the eyes), and I also line my inner tear ducts (the part of the eye closest to the nose).
As noted in the application, I did line the inner rims of the eyes, as well as the tear ducts.
Do heating or cooling ducts run through the wall?
A suspended ceiling hangs and hides pipes, ducts, wires, etc., but it also takes away eight inches from the height of the room.
This air is forced through the evaporator coils where it is cooled, passes through an air filter and is dispersed back into the house through the ducts and vents.
From there, the warmed air enters a plenum from which it is dispersed into the home through the network of ducts.
The area on either side of an existing door or opening may contain plumbing, electrical and air ducts that could make the job more involved and expensive than you'd planned.
If you have visible ducts, cables, vents and the like, they'll give you a clue that there's something going on behind the wall that will have to be dealt with before you can make a straightforward installation.
If you've recently inquired about the price of professional air duct cleaning, you're probably wondering "can I clean my air ducts myself?"
You'll be pleased to know that you can clean air ducts with the proper instructions and the right equipment.
Air ducts are a major part of heating, ventilating and air-conditioning (HVAC) systems.
In order to ensure that air flows through the air supply ducts, attention must be paid to the system's other parts, including furnaces, air conditioning pumps, registers, fans and coils.
While you can still clean air ducts yourself, know that the professionals use special equipment to clean heating and cooling systems.
Professionals use special brushes to clean the inside of air ducts.
Ducts made from fiberglass or sheet metal ducts with a fiberglass lining must be cleaned with a soft-bristled brush.
Professionals use portable, high-volume air compressors to remove stuck-on dust and dirt from the inside of ducts.
Once the dust and dirt is dislodged from inside the air ducts, professionals remove the residue with a powerful HEPA (high efficiency particle air) vacuum cleaner.
Professionals use vacuums with long hoses, which is necessary to clean the full length of ducts.
While a professional may do a more thorough job of cleaning air ducts (as they have special equipment), you can improve your air quality by cleaning the entry ways of the air ducts yourself.
While this way of cleaning air ducts may cut down on the dust that enters your living space, consider renting professional air duct cleaning equipment to thoroughly clean the ductwork.
When you clean air ducts, be sure to clean the associated components of the HVAC system.
You can certainly save money by cleaning your air ducts yourself, just be aware that you won't be able to complete the job without the right equipment.
Most of the ducts' interiors will likely be out of your reach and you won't be able to reach them.
Hire a professional if your ducts are affected by mold or mildew.
Properly maintained heating and cooling systems will lessen the need to have your air ducts cleaned.
Dusting and vacuuming with a HEPA vacuum will also cut down on dust in the air and help to keep your air ducts clean in the future.
It is a common belief that the underwire support may add pressure on the breast, especially in larger breasted women, that can lead to clogged milk ducts or otherwise lower milk production.
For example, tight-fitting bras can also reduce milk flow, and bras that don’t offer enough support can also lead to problems with soreness and plugged ducts.
They have top ventilation ducts and cushioned nose pads for added comfort.
Biliary atresia is the congenital absence or closure of the ducts that drain bile from the liver.
Bile is a liquid mixture of cholesterol, bile salts, and waste products, including bilirubin, which the liver excretes through thousands of tiny biliary ducts to the intestine, where the bile aids in the digestive process of dietary fats.
These ducts merge into larger and larger channels, like streams flowing into rivers, until they all pour into a single duct that empties into the duodenum (first part of the small intestine).
If bile cannot get out because the ducts are absent or blocked, it backs up into the liver (referred to as biliary stasis) and eventually into the rest of the body.
The tiny bile ducts in that part of the liver where the surgery is performed discharge their bile directly into the intestine, and the channels will gradually enlarge.
A possible complication after the Kasai operation is an infection in the bile ducts (cholangitis).
Continued problems often develop because there are also obstructed ducts within the liver that cannot be surgically treated.
During the first half of pregnancy the mammary ducts proliferate and group together to form large lobules.
The bile travels through the bile ducts to the intestine and is excreted in the stool.
One cause of hyperbilirubinemia in seemingly healthy full-term or near-term infants is biliary atresia, an obstruction or inflammation of the bile ducts.
Jaundice can result from a congenital (present at birth) malformation of the liver, bile ducts, or gall bladder.
Biliary atresia-the underdevelopment, inflammation, or obstruction of the bile ducts that carry bile from the liver to the gall bladder and small intestine-causes bile to build up in the liver and forces the bilirubin into the blood.
About 40-50 percent of infants with biliary atresia are candidates for replacement bile ducts leading from the liver into the intestine.
Called the Kasai procedure or hepatoportoenterostomy, the obstructed ducts are replaced with sections from the infant's intestines.
This scratching leads to scarring of the cornea, eventual blockage of the tear ducts, and blindness.
Once ovulation and menstruation begin, the maturing of the breasts begins with the formation of secretory glands at the end of the milk ducts.
Estrogen, which is produced by the ovaries in the first half of the menstrual cycle, stimulates the growth of milk ducts in the breasts.
Only one type of MRI scan, called a magnetic resonance cholangiopancreatography (MRCP), which scans the bile ducts, requires that the child not eat or drink anything for two to three hours prior to the scan.
If the child has mumps, the openings to the ducts inside the mouth will be slightly inflamed and have a "pouty" appearance.
Other less common causes of conjunctivitis include exposureto sun lamps or the electrical arcs used during welding and problems with inadequate drainage of the tear ducts.
Anastomosis-Surgical reconnection of two ducts, blood vessels, or bowel segments to allow flow between the two.
Molds live in damp spots throughout the house, including basements, bathrooms, air ducts, air conditioners, refrigerator drains, damp windowsills, mattresses, and stuffed furniture.
An air filter should be used on air ducts in the child's room.
If you decide to buy one with an underwire, remember not to sleep in it and to make sure the wire does not put pressure on the breasts, which can lead to blocked ducts and mastitis.
This can lead to plugged ducts or mastitis.
Your breast is full of ducts and sensitive alveoli.
The alveoli are actually what fills with milk, and when your baby attaches to the areola of the breast and begins to suck, the aveoli empty into the milk ducts and out the nipple into your baby's mouth.
Milk that remains in the breasts becomes thicker and clogs the ducts, providing a perfect place for bacteria to breed.
Massage the affected area to increase circulation and help loosen any plugged milk ducts.
If you can, try different breastfeeding positions to make sure all the milk ducts are getting emptied.
For women with very large or pendulous breasts, however, repositioning may require cutting the nerves and ducts that connect to the nipples.
Breasts contain special cells that produce milk, plus ducts to carry the milk down to the nipple.
When breast tissue is removed, some of those ducts are removed with it.
Hair grows from thousands of tiny ducts in the skin called follicles, with more follicles concentrated on your head than anywhere else.
Is it away from heating ducts and air conditioning vents?
Cleaning the air ducts in your home is an important heating, venting and air conditioning (HVAC) system maintenance task.
Since the air is being re-circulated it is easy to understand that microbes, dust, and pollen in the atmosphere will end up in your air ducts.
There is also the possibility that the ducts may accumulate insects, rodents, and may even grow mold and fungus.
Vacuum out the air ducts with the hose attachment reaching as far into them as possible.
Severely odorous homes will require a professional to clean the ducts.
Professionals use heavy-duty vacuums and equipment that can reach far into the heart of the ducts.
You can rent the necessary equipment that will enable you to clean the ducts to the same degree as a professional.
Regular maintenance is the best way to keep your air ducts clean and free from unwanted odors, mold, mildew, insects, and rodents.
Try to avoid bras with an underwire, which have been associated with mastitis, a painful infection of the milk ducts.
Remember, bras that are too tight can leave you vulnerable to plugged milk ducts, so you'll want to avoid any bra that restricts the flow of your milk in any way.
Muffit's new sniffing ability helps him navigate a twisted path through the ship's air ducts for mask.
Heat rash is caused when the body overheats and sweat ducts get blocked and swell.
Simply put, aluminum is an antibacterial that temporarily plugs the sweat ducts, thereby decreasing the amount of perspiration produced in that area.
The fixing of stoves of this kind entails the laying of pipes or ducts from the open to convey fresh air to the back of the stove.
Lastly, to pass over unnecessary details, the markings of various kinds to be observed on the lobes of the livers of freshly-slaughtered animals, which are due mainly to the traces left by the subsidiary hepatic ducts and hepatic veins on the liver surface, were described as "holes," "paths," "clubs" and the like.
When a number of cables follow the same route, they are generally laid in conduits made up of earthenware or cement ducts; iron pipes are used when the number of cables is small.
Manholes are placed at intervals in the line of ducts to facilitate the drawing in and jointing of the cables, and surface boxes are placed in the footways for distributing purposes.
In some cases special secreting tissues, resin ducts, oil glands, laticiferous tissue, crystal sacs, &c., may be developed among the ordinary secondary vascular elements.
The next chamber, the urodaeum, is small, and receives in its dorso-lateral wall the ureters and the genital ducts; above and below this chamber is closed by circular folds, the lower of which, towards the ventral side, passes into the coating of the copulatory organ when such is present.
It is easy to distinguish the great primitive watercourses from the lateral ducts which they fed, the latter being almost without banks and merely traceable by the winding curves of the layers of alluvium in the bed, while the former are hedged in by high banks of mud, heaped up during centuries of dredging.
The glands occur in groups, and lead into common ducts which open usually so much reduced that the foremost apparent ventral sclerite of the abdomen represents the third sternite.
The sperm ducts are usually longer than the oviducts; but in Limicolae both series of tubes opening by the funnel into one segment and on to the exterior in the following segment.
These ducts therefore have not their exact counterparts in the Oligochaeta, unless we are to assume that they collectively are represented by the seminal vesicles of earthworms and the vasa deferentia.
Two pairs of salivary ducts, each leading from a salivary gland, open into the buccal chamber.
The sexes are distinct, as in all Streptoneura; and genital ducts and accessory glands and pouches are present, as in all Pectinibranchia.
Accessory organs are rarely found on the genital ducts, but occur in Paludina, Cyclostoma, Naticidae, Calyptraeidae, &c. Mandibles usually present.
The liver opens by two ducts into the digestive FIG.
Palmen (1884) on these ducts have shown that in may-flies and in female earwigs the paired mesodermal ducts open directly to the exterior, while in male earwigs there is a single mesodermal duct, due either to the coalescence of the two or to the suppression of one.
The presence of rudiments of the genital ducts of both sexes in the embryo of either sex is interesting and suggestive.
Genital ducts paired and entirely mesodermal.