CARDIOLOGY
AORTIC STENOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Two systemic arches join together and form dorsal aorta in ____
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birds and mammals
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mammals and reptiles
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amphibians and reptiles
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birds and amphibians
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Explanation:
Detailed explanation-1: -In reptiles, the gills are fully replaced by lungs. Only III, IV and VI aortic arches are present. With the partial separation of the ventricle into two parts, the distal portion of the conus arteriosus and the entire ventral aorta are split into three vessels, i.e., two aortic or systemic and one pulmonary.
Detailed explanation-2: -systemic arch A paired blood vessel in the embryos of tetrapods that carries blood from the aorta to the trunk and hind limbs. It is derived from the fourth aortic arch. Adult amphibians and reptiles retain both arches, while birds and mammals only have one.
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