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1. (n.) portal system
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.
Etymology: (1850–55)
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| Definition of 'portal system' |
Princeton's WordNet |
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1. (noun) portal system
system of veins that carry blood from the abdominal organs to the liver
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| Definition of 'portal system' |
U.S. National Library of Medicine |
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1. portal system
A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second set of capillaries before it returns to the systemic circulation. It pertains especially to the hepatic portal system.
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Definitions of portal system 
