Question

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

Answer 1

Explanation:

Diffusion, being a slow process will take a lot of time to circulate oxygen to all parts of body cell

Answer 2

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$ANSWER:$

In case of a single-celled organism, no specific organs are needed because the entire surface of organism is in contact with the environment whereas in the multicellular organisms, all the cells may not be in direct contact with the surrounding environment. This. the simple diffusion can not meet the requirements of all cells.

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