| 释义 |
DictionarySeeveinvitelline vein
vitelline vein[vī′tel‚ēn ′vān] (embryology) Any of the embryonic veins in vertebrates uniting the yolk sac and the sinus venosus; their proximal fused ends form the portal vein. Also known as omphalomesenteric vein. vitelline vein
vi·tel·line veina vein returning blood from the yolk sac to the embryo. Synonym(s): vena vitellinavitelline vein Along with the umbilical and the cardinal veins, the vitelline veins form one of the three venous systems of the early embryo. The vitelline veins return blood from the yolk sac. These veins are the precursors of many of the gut veins, including the portal system, and are focal structures in the developing liver. See also: vein |