portal system
American Heritage Dictionary:
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portal system
n.
A system of blood vessels that begins and ends in capillaries.
American Heritage Stedman's Medical Dictionary:
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portal system
n.
A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second capillary network.
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categories related to 'portal system'
- Heart and Circulatory and Lymphatic Systems - portal system: veins that conduct blood from one capillary network to another
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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American Heritage Stedman's Medical Dictionary
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.
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