Question

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Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

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Answer 1

Answer:

As in multicellular organisms, all the cells are not in direct contact with environment, simple diffusion does not meet the requirement of all the body cells to get sufficient oxygen

Explanation:

Bruh

Answer 2

Answer:

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Diffusion is unable to meet the oxygen requirements of multi-cellular organisms such as humans because diffusion is one of the slow processes.