superior vena cava

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superior vena cava

[sə′pir·ē·ər ¦vē·nə ′kä·və]
(anatomy)
The principal vein collecting blood from the head, chest wall, and upper extremities and draining into the right atrium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.