vitelline vein


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vi·tel·line vein

a vein returning blood from the yolk sac to the embryo.
Synonym(s): vena vitellina

vitelline vein

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.

vitelline 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
References in periodicals archive ?
It has been postulated that during embryologic development, there is a regression failure in the right primitive vitelline vein.
The diverticular remnant of the vitelline vein is believed to enlarge, forming a saccular aneurysm of the portal vein later in life.
It arises when there is degeneration of the erroneous portion of the vitelline veins system.