atria

[ (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.)

QUIZZES

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In our third teacher-created PSAT practice test there are new and unique vocabulary terms you may have never heard of! Can you guess what they mean?
Question 1 of 10
seclusion
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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