atria
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(ay-tree-uh)
sing. atrium (ay-tree-uhm)
The two upper chambers in the heart, which receive blood from the veins and push it into the ventricles. (See circulatory system.)
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Dictionary of Cultural Literacy: Health
The New Dictionary of Cultural Literacy, Third Edition Edited by E.D. Hirsch, Jr., Joseph F. Kett, and
James Trefil. Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin. All rights reserved.
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