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MANUAL OF PHYSIOLOGY. 



must be borne in mind that it is on the opposite side to that it 

 occupies in man. 



FIG. 290. 



A. Plan of principal veins of the foetus of about four weeks old. B. Veins of the 

 liver at an earlier period. C. Veins after the establishment of the placental circulation. 

 D. Veins of the liver at the same period. -j. Primitive jugular veins, dc. Ducts of Cu- 

 vier. ca. Cardinal veins, ci. Inferior vena cava. I. Ductus venosus. u. Umbilical vein. 

 p. Portal vein. o. Vitelline vein. cr. External iliac veins, o'. Bight vitelline vein. 

 '. Right umbilical vein. V. Hepatic veins (venae revehentes). p'p'. Venae advehentes. 

 m. Mesenteric veins, az. Azygos vein. ca'. Remains of left cardinal vein. s. Subcla- 

 vian vein. li. Cross branch from left jugular which becomes the left branchio-cephalic 

 vein. ri. Right innominate vein. s.s. Subclavian veins, h. Hypogastric veins, il, 

 Division of inferior vena cava into the common iliac veins. 



