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portal vein

noun, Anatomy
1.
the large vein conveying blood to the liver from the veins of the stomach, intestine, spleen, and pancreas.
Origin
1835-1845
1835-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for portal vein
  • From these viscera the blood is conveyed to the liver by the portal vein.
  • The right branch of the portal vein enters the right lobe of the liver, but before doing so generally receives the cystic vein.
  • It accompanies the hepatic artery, ramifying upon its branches, and upon those of the portal vein in the substance of the liver.
  • Your radiologist will use the stent to connect your portal vein to one of your hepatic veins.
  • We injected the cells back into his portal vein and they took up home in the liver and the guy was fine.
British Dictionary definitions for portal vein

portal vein

noun
1.
any vein connecting two capillary networks, esp in the liver (hepatic portal vein)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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portal vein in Medicine

portal vein n.
A wide short vein that is formed by the superior mesenteric and splenic veins behind the pancreas, ascends in front of the inferior vena cava, and divides into right and left branches that ramify within the liver. Also called hepatic portal vein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for portal vein

large vein through which oxygen-depleted blood from the stomach, the intestines, the spleen, the gallbladder, and the pancreas flows to the liver. The principal tributaries to the portal vein are the lienal vein, with blood from the stomach, the greater omentum (a curtain of membrane and fat that hangs down over the intestines), the pancreas, the large intestine, and the spleen; the superior mesenteric vein, with blood from the small intestine and part of the large intestine; the pyloric veins, with blood from the stomach; and the cystic veins, with blood from the gallbladder. In the liver the blood from the portal vein flows through a network of microscopic vessels called sinusoids in which the blood is relieved of worn-out red cells, bacteria, and other debris and in which nutrients are added to the blood or removed from it for storage. The blood leaves the liver by way of the hepatic veins.

Learn more about portal vein with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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