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Definition of Vein, portal

Vein, portal: A large vein that carries blood from the stomach and the intestines to the liver.

The portal vein is formed by the union of the splenic and superior mesenteric veins. It conveys venous blood to the liver for detoxification before the blood is returned to the circulation via the hepatic veins.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=9186
Last Editorial Review: 6/14/2012

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