Question

Trace the evolution of aortic
arches in vertebrates?
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Answer 1

The evolution of aortic arches and cardiac chambers in vertebrates. (A) Primitive fishes, represented by sharks, have six paired gill arches. During air respiration, the blood is shunted through arches three and four, while the ductus arteriosus in arch six shunts oxygen-poor blood away from the gills and to the lungs.

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