CARDIOLOGY
AORTIC STENOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In Aves ____ systemic arch forms median dorsal aorta.
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right
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left
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both right and left
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none of these
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Explanation:
Detailed explanation-1: -In birds, the systemic arch is formed by the fourth right aortic arch and the anterior arteries which are supplying the head region (internal carotid arteries, common carotid, brachiocephalic) gives rise to the blood vessels in the forelimbs (subclavian arteries).
Detailed explanation-2: -Arch 4. Also known as the systemic arch. The fourth right arch forms the most proximal segment of the right subclavian artery, as far as the origin of its internal thoracic branch.
Detailed explanation-3: -Adult birds only have one right aortic arch while adult mammals only have left one.
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