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portal system

noun, Anatomy.
a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins.
(loosely) the hepatoportal system.
Origin of portal system
1850-55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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portal-system in Medicine

portal system n.
A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second capillary network.

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