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TAKE THE QUIZaortic arch
noun
1
: one of the arterial branches in vertebrate embryos that exist in a series of pairs with one on each side of the embryo, connect the ventral arterial system lying anterior to the heart to the dorsal arterial system above the digestive tract, and persist in adult fishes but are reduced or much modified in the adult of higher forms
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Merriam-Webster unabridged
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- Namesake of the leotard, Jules Léotard had what profession?


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