portal vein

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Related to Portal vessel: portal system, hypophyseal hormones

portal vein

[′pȯrd·əl ‚vān]
(anatomy)
Any vein that terminates in a network of capillaries.
References in periodicals archive ?
In particular, the immunoreactivity of portal vessels and central veins for FVIIIRAg provides an internal positive control for determining the development of vascular endothelial phenotype in sinusoids of the liver parenchyma.
There is very little evidence for recurrent herniation and there is postulation that closure of the foramen poses risk to portal vessels and surrounding structures.
Due to the modern vision of the pathogenesis of portal hypertension the pressure level in portal vein is determined by three factors: the size of portal blood flow (increases not only because of splanhnic vasodilatation, but also because of increased angiogenesis in the liver and formation of arterio-venous anastomoses between the branches of hepatic artery and portal vein in the fibrous septum), vascular tone of the branches of portal vessels, and general intrahepatic vascular resistance [12].