CARDIOLOGY
AORTIC STENOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In mammals ____ 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 vertebrates, the main blood vessel carrying blood from the heart to the body is called systemic arch. Birds have a right systemic arch but mammals have left systemic arch.
Detailed explanation-2: -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).
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