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MANUAL OF PHYSIOLOGY. 



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. Primi- 

 tive jugular veins, dc. Ducts of Cuvier. ca. Cardinal veins, ci. Inferior 

 vena cava. 1. Ductus venosus. u. Umbilical vein. p. Portal vein. o. 

 Vitelline vein. cr. External iliac veins. o f '. Right vitelline vein. u'. 

 Bight umbilical vein. I'. Hepatic veins (vense revehentes). p'p'. Venae 

 advehentes. m. Mesenteric veins, az. Azygos vein, ca' '. Remains of left 

 cardinal vein. s. Subclavian vein. li. Cross branch from left jugular which 

 becomes the left branchio-cephalic vein. ri. Right innominate vein. s.s. 

 Subclavian veins. A. Hypogastric veins. U. Division of inferior vena cava 

 into the common iliac veins. 



