File:Anatomy, descriptive and surgical (electronic resource) (1860) (14761788971).jpg

Identifier: b20386424 (find matches)
Title: Anatomy, descriptive and surgical (electronic resource)
Year: 1860 (1860s)
Authors: Gray, Henry, 1825-1861 Carter, H. V., ill Westmacott, John Guise, Dr, ill
Subjects: Anatomy
Publisher: London : J.W. Parker
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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tricle into the descending aorta. The umbilical, or hypogastric arteries, arise from the internal iliacs, in additionto the usual branches given off from these vessels in the adult. Ascending alongthe sides of the bladder to its fundus, they pass out of the abdomen at theumbilicus, and are continued along the umbilical cord to the placenta, coiling roundthe umbilical vein. They return the blood to the placenta which has been circulatedin the system of the foetus. The peculiarity in the venous system of the fcetus is the communicationestablished between the placenta, and the liver and portal vein, through theumbilical vein, and with the inferior vena cava by the ductus venosus. 668 THE THORAX. FcETAL Circulation. . The arterial blood destined for the nutrition of the foetus, is carried from theplacenta to the foetus, along the umbilical cord, by the umbilical vein. Theumbilical vein enters the abdomen at the umbilicus, and passes upwards along the 354.—Plan of the Foetal Circulation.
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In this plan the figured arrows represent the kind of blood, as well as the direction which it takes in the vessels. Thus—arterial blood is figured g§> ; venous blood, ■>>; mixed (arterial and venous blood), FCETAL CIRCULATION. 669 free margin of the suspensory ligament of the liver, to the under surface of thisoro-an, where it gives off two or three branches to the left lobe, one of which isof large size; and others to the lobus quadratus and lobus Spigelii. At thetransverse fissure, it divides into two branches; of these, the larger is joined bythe portal vein, and enters the right lobe: the smaller branch continues onwards,under the name of the ductus venosus, and joins the left hepatic vein at thepoint of junction of this vessel with the inferior vena cava. The blood, there-fore, which traverses the umbilical vein, reaches the inferior cava in three differentI ways. The greater quantity circulates through the liver with the portal venousblood, before entering the cav

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