why is diffusion to meet the oxygen requirements of multicellular organism like humans
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In multicellular organisms such as man, the volume of the human body is big and hence, oxygen cannot diffuse into all the cells of the human body quickly. ... Hence, diffusion is insufficient to meet the oxygen requirements of multicellular organisms like humans.
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In multicellular organisms like humans, all the body cells are not in direct contact with the surrounding environment . Thus , every cell of the body will not get oxygen as by the process of diffusion from the environment .
Therefore diffusion is insufficient to meet
the oxygen requirements of multicellular
organisms .
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