Question

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

Answer 1

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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Answer 2

Explanation:

Human beings are multicellular organisms having a complex body structure. The oxygen requirement in multicellular organisms cannot be met by diffusion because-

1) Diffusion is a slow process.

2) In multicellular organisms, the cells are not in direct contact with the outside environment as in unicellular organisms.

Therefore, in human beings, there are specialized tissues and organs that help to meet the oxygen requirements of the body.

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