why is diffusion insufficient to meet the oxygen requirement of multicellular organisms like humans
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because we have only our skin's outter surfase contact with environment but other parts are not in contact so we have a specialized organs like lungs , gills ,etc
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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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