The floor of the pericardial bb, Cut remnant of the auricle.
The walls of the pericardium are also excretory in parts, these parts forming the pericardial glands.
The its muscular coat; g, g, the heart is of the usual Arthro lateral teeth, which when podous type, lying in a more or in use are brought in conless well-defined pericardial blood tact with the sides of the sinus, with which it communi median tooth m; c, c, the cates by valvular openings or muscular coat.
To this pericardial coelom is frequently added a gonocoel enclosing the gonads and the funnels of their ducts.
When the pericardium is cut open from above in an animal otherwise entire, the anterior face of the kidney is seen forming the posterior wall of the pericardial chamber; on the deep edge of this face, a little to the left of the attachment of the auricle to the floor of the pericardium, is seen a depression; this depression contains the opening from the pericardium into the kidney.
37), in which it is possible most satisfactorily to study in the living animal, by means of the microscope, the course of the blood-stream, and also the reno-pericardial communication.
»' = 1, ' ing pericardial sinus.
- Dorsal Muscles, Heart and various tissues and Pericardial Tendons of Cockroach.
P, Pericardial septum.
By the pulsation of the pericardial vesicle (best observed in the larva) the blood is driven into the glomerulus, from which it issues by efferent vessels which effect a junction with the ventral (sub-intestinal) vessel in the trunk.
[How the inversion of the nerve-end-cells and their connexion with the nerve-fibres is to be reconciled with the condition found in the adult, or with that of the monostichous eye, has not hitherto been explained.] (From Korschelt and Heider.) The great pericardial sinus is strongly developed in both animals.
Opening in pairs in each somite, right and left into the pericardial sinus are large veins, which bring the blood respectively from the gill-books and the lungbooks to that chamber, whence it passes by the ostia into the heart.
In both animals the wall of the pericardial sinus is connected by vertical muscular bands to the wall of the ventral venous sinus (its lateral expansions around the lung-books in Scorpio) in each somite through which the pericardium passes.
In the treatment of effusions into the pleura and, though with less advantage, of pericardial effusions, direct mechanical interference was practised by one physician and another, till these means of attaining rapid and complete cure took their places as indispensable, and were extended from thoracic diseases to those of the abdominal and other inner parts formerly beyond the reach of direct therapeutics.
Of classificatory value, and p, p, Pericardial cavity.
The pericardium cut away on e, Reno-pericardial orifice.
This investment, which occurs also in many Filibranchia, forms the pericardial glands, comparable to the pericardial accessory glandular growths of Cephalopoda.
In Unionidae and several other forms the pericardial glands are extended into diverti cula of the pericardium which penetrate the mantle and constitute the organ of Heber.
Solenomya, in which the gonad opens into the reno-pericardial duct.
But the generative products do not pass through the whole length of the renal tube: there is a direct opening from the pericardial end of the tube to the distal end, and the ova or sperms pass through this.
In Mollusca the coelom is reduced and consists of two parts, the pericardial cavity which surrounds the heart, and the cavity of the gonads or generative organs.
In the former the genital coelom and the pericardial coelom are continuous and the reproductive cells escape by the renal ducts.
The renal organs are tubular outgrowths of the pericardial parts of the coelom; the reproductive cells are derived from cells lining the generative portion.
R.p.o, Reno-pericardial orifice.
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.
The heart and pericardial chamber in the oyster lie along the anterior face of the adductor muscle, almost perpendicular to the direction of the gills, with which in Anodon they are parallel.
The pericardium being absent, there are no reno-pericardial apertures.
- Diagram to show the gradual formation of the Arthropod pericardial blood-sinus and "ostiate " heart by the swelling up (phleboedesis) of the veins entering the dorsal vessel or heart of a Chaetopod-like ancestor.
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.