CARDIOLOGY
AORTIC STENOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The Vertebrate animal has a maximum ____ pairs of aortic arches.
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4
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5
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6
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7
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Explanation:
Detailed explanation-1: -Amphioxus has the largest number of aortic arches (19 pairs). Among vertebrates, the largest number of aortic arches is found in some species of cyclostomes (15 pairs in Bdellostoma stouti). However, in gnathostomes (jawed vertebrates) the maximum number of aortic arches is six pairs (Figure 8.1).
Detailed explanation-2: -Worms are also unusual, with five structures called aortic arches acting as basic hearts.
Detailed explanation-3: -The aortic arches are a series of six arches that develop consecutively to connect the aortic sac with the paired dorsal aorta. Cardiac neural crest cells migrate through aortic arches 3, 4, and 6 during weeks 3-4 of human development.
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