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

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 ?
Anomalous persistence in embryos of parts of peri-intestinal rings formed by vitelline veins. Am J Anat 1912; 13: 103-110.
The renal segment develops from the anastomosis between the subcardinal and supracardinal veins while the hepatic segment derives from the right vitelline vein [6, 7].
Though exact mechanism is unknown, various etiologies ranging from congenitally defective regression of right primitive vitelline vein to acquired causes such as portal hypertension, liver cirrhosis, trauma, pancreatitis, liver biopsy or tumor invasion have been reported.