What is double circulation ? Why is it found in birds and mammals and not fish?
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Answer:
It is found in mammals and birds but not in fishes because they are warm blooded and require more energy to maintain their body temperature. This will be fulfilled by more oxygen that will be supplied by double circulation.
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It is found in mammals and birds but not in fishes because they are warm blooded and require more energy to maintain their body temperature. This will be fulfilled by more oxygen that will be supplied by double circulation.
Please give me thanks or brainlist answer
Please give me thanks or brainlist answer
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