File:The comparative anatomy of the domesticated animals (1886) (20723988321).jpg

Title: The comparative anatomy of the domesticated animals
Identifier: cu31924000012389 (find matches)
Year: 1886 (1880s)
Authors: Chauveau, A. (Auguste), 1827-1917; Arloing, S. (Saturnin), 1846-1911; Fleming, George, 1833-1901. tr
Subjects: Veterinary anatomy
Publisher: New York, D. Appleton and Company
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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THE FOETUS. 901 covered by thepentoneum, and arrives at the liver, into which it enters and opens directly mto the vena portae ; the junction of the two vessels siving rise to a single canal from which proceed the hepatic veins. In other animals than Solipeds, this vessel gives off a particular trunk of somewhat Fig. 428.
Text Appearing After Image:
A FCETDS OPENED ON THE LEFT SIDE TO SHOW THE COURSE OE THE UMBILICAL VESSELS IN THE BODY. A, Umbilical cord; B, Umbilical vein; c, Umbilical artery; b, Bladder; E, Testicle j r, Kidney; G, Spleen; H, Liver; I, Intestine, J, Lung; K, Heart; L, Pulmonary artery; M, Ductus arteriosus; N, Thymus gland. considerable volume, which passes directly to the posterior vena cava, forming what is named the ductus venosus (Figs. 429, 430). Such are the umbilical vessels, and it will be seen that they form a part of the circulatory system of the young creature which will be more com- pletely studied hereafter. ^ DIFFEEBNTLIL CHAKACTEBS IN THE ANNEXES OP THE FCETUS OP OTHER THAN SOLIPED ANIMALS. 1. KuMiN'ANTS.—Tlacenta.—Tlie placental apparatus of the Cow is not uniformly spread over the outer surface of the chorion, but is constituted by a variable number of vascular bodies about sixty on an average, disseminated here and there, and dovetailed by reciprocal penetration of prominences and cavities, into analogous bodies on the inner surface of the uterus, designated cotyledons. These are only thickened points of the mucous membrane, the follicles of which are enormously enlarged. They exist, we have seen, before gestation; but observation demonstrates that they may be afterwards formed or entirely renewed, especially in those cases in which accidental circumstances have rendered those present insufBoient for their office. The largest are found in the body of the uterus; in the cornua they are smaller as they are nearer the extremity. Their form is generally elliptical, and they are attached to the uterine surface by a wide mucous 60

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