aor'tic arch'

one member of a series of paired curved blood vessels that arise in the embryo from the ventral aorta, pass around the pharynx through the branchial arches, and join with the dorsal aorta to form the great vessels of the head and neck.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

aortaaortic insufficiency
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