Question

Why are the surfaces which are responsible to exchange gases for respiration in bigger animals are protected within the body?​

Answer 1

Answer:

Large animals cannot maintain gas exchange by diffusion across their outer surface. They developed a variety of respiratory surfaces that all increase the surface area for exchange, thus allowing for larger bodies.

Explanation:

Here your answer

Answer 2

Explanation
Large animals cannot maintain gas exchange by diffusion across their outer surface. They developed a variety of respiratory surfaces that all increase the surface area for exchange, thus allowing for larger bodies.
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