Question

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? How is this challenge met by a multicellular organism?

Answer 1

Answer:

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Answer 2

Answer:

Diffusion is insufficient to meet the oxygen requirement of multicellular organisms like human because all the cells are not direct contact in environment and diffusion is a slow process. Diffusion is too slow to cover the distance between the gas exchange surface and the sites where the oxygen is required.

Explanation:

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