In which of the following animals,the heart d | vedclass

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(D) The heart of fishes is $2$-chambered,consisting of one atrium (auricle) and one ventricle.Unlike mammals,reptiles,and amphibians,which have a divi

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Fishes

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(D) The heart of fishes is $2$-chambered,consisting of one atrium (auricle) and one ventricle.Unlike mammals,reptiles,and amphibians,which have a divided atrium (left and right auricles),the fish heart receives only deoxygenated blood,which is then pumped to the gills for oxygenation.Therefore,the heart in fishes does not have separate left and right auricles.

In which of the following animals,the heart does not have the left and right auricles?

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