portal system

portal system: see circulatory system.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on portal system from Fact Monster:

  • circulatory system - circulatory system circulatory system, group of organs that transport blood and the substances it ...
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  • Encyclopedia: Anatomy and Physiology - Encyclopeadia articles concerning Anatomy and Physiology.

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