. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 260.—Heart of Human Ecetus (8th Month). A, From the right, and B, from the left side. (After Rose.) The walls of the atrium and ventricle are partly removed in each figure. , left sinu-auricular valve, fused with the septum atriorum {,); , Thebesian valve, in direct connection with the Eustachian valve (]; L. V, left atrium ; , foramen ovale ; , left precaval; , postcaval; , aorta; P, ,, pulmonary artery; DB, ductus Botalli (ductus arteriosus); pulmonary vein ;
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. Fig. 260.—Heart of Human Ecetus (8th Month). A, From the right, and B, from the left side. (After Rose.) The walls of the atrium and ventricle are partly removed in each figure. , left sinu-auricular valve, fused with the septum atriorum {,); , Thebesian valve, in direct connection with the Eustachian valve (]; L. V, left atrium ; , foramen ovale ; , left precaval; , postcaval; , aorta; P, ,, pulmonary artery; DB, ductus Botalli (ductus arteriosus); pulmonary vein ; , coronary vein. Thebesian valves (Fig. 260, a) ; these represent the remains of the right sinu-auricular valve, and serve in the embryo to conduct the blood from the right atrium into the left. Great variations are seen in the mode of origin of the carotids and subclavians from the arch of the aorta in Mammals. Thus. 4^^ Fig. 261.—Five Different Modes of Origin of the Great Vessels from THE Arch op the Aorta in Mammals. Ao, aortic aich , Ih, the, brachiocephalic trunk ; c, carotids ; s, subclavians. there may be a IracMocephalic or innorainate irimh on either side (Fig. 261, a) ; or an unpaired common brachiocephalic, from which the carotid and subclavian of one or both sides arise (B, C, E); or,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wiedersheim, Robert, 1848-1923; Parker, William Newton, 1857-1923. London, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
