atrioventricular septum

Medical Dictionary

atrioventricular septum n.
The small part of the membranous septum of the heart just above the septal cusp of the tricuspid valve, separating the right atrium from the left ventricle.

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