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Related to vitelline vein: cardinal veins, umbilical vein, sinus venosus, Omphalomesenteric vein, vitelline artery
a vein returning blood from the yolk sac to the embryo.
Synonym(s): vena vitellina
any of the embryonic veins that return blood from the yolk sac to the primitive heart of the early developing embryo. Also called omphalomesenteric 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