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aortic plexus

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n.

A plexus of lymph nodes and connecting vessels lying along the lower portion of the abdominal aorta.
An autonomic plexus surrounding the abdominal aorta and continuous with the thoracic aortic plexus; abdominal aortic plexus.
An autonomic plexus surrounding the thoracic aorta and passing with it through the aortic opening in the diaphragm to become continuous with the abdominal aortic plexus; thoracic aortic plexus.

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

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