The development of the human body; a manual of human embryology . Fig. 149.—A, The Venous Trunks of an Embryo op 5 mm. seen fromthe Ventral Surface; B, Diagram Illustrating the Trans-formation to the Adult Condition. Vcd and Vcs, right and left superior venae cava?; Vj, jugular vein;, omphalo-mesenteric vein; Vp, vena porta; Vu, umbilicalvein (lower part); Vu1, umbilical vein (upper part); Vud and Vus,right and left umbilical veins (lower parts).—(His.) blood from the placenta, and appears to be the direct con-tinuation of the ductus venosus (Fig. 149, C), into whichopen the hepatic veins,
The development of the human body; a manual of human embryology . Fig. 149.—A, The Venous Trunks of an Embryo op 5 mm. seen fromthe Ventral Surface; B, Diagram Illustrating the Trans-formation to the Adult Condition. Vcd and Vcs, right and left superior venae cava?; Vj, jugular vein;, omphalo-mesenteric vein; Vp, vena porta; Vu, umbilicalvein (lower part); Vu1, umbilical vein (upper part); Vud and Vus,right and left umbilical veins (lower parts).—(His.) blood from the placenta, and appears to be the direct con-tinuation of the ductus venosus (Fig. 149, C), into whichopen the hepatic veins, returning the blood distributedby the portal vein to the substance of the liver. Returning now to the cardinal veins, it has been foundin the rabbit that the branches which come to them fromthe mesentery anastomose longitudinally to form a vessel 284 THE DEVELOPMENT OF THE HUMAN BODY. lying parallel and slightly ventral to each cardinal. Thesemay be termed the subcardinal veins (Lewis), and in theirearliest condition they open at either end into the corre-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
