Abstract
Corrosion preparations of the hepatic vessels were made from 20 cases of human embryos and the transformation of viteline and umbilical veins in the region of the liver was investigated on 10 preparations in which the infusion was complete. Result of this investigation revealed that first V.viteline is formd in the liver, and then, V.umbilicalis is combined to it forming V. advehens which changes into V.revehens after passing through the capillary plexus and joins to V. cava inferior.
On rare occasions, however, V, revehens which enters directly into V. cava inferior is located beneath the right side V. suprarenalis.
