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| a·or·tic arch (plural a·or·tic arches) |
noun |
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1. curved section of main artery: the section of the largest artery aorta in the body that forms the curve between the ascending and descending parts. As it leaves the heart, the aorta goes upward and then bends back on itself to form the arch.
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2. set of paired arteries: a set of paired curved arteries, one of several in the vertebrate embryo that begin in the aorta, rise through the pharynx, and join with the dorsal arterial system
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