Question

Why do mammals require more extensive respiratory surface.

Answer 1

Hi there ........ here is your answer

Mammals require an extensive respiratory surface because we have high energy requirements. Unlike fishes ,reptiles and amphibians ,we are warm blooded and maintain a constant body temperature and this does take energy .Compared to reptiles we use more oxygen because we need it to convert food into body heat.

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Answer 2

Because their body is too complex..