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Why diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans |
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Answer» Because in human beings body cells are not in direct contact of external environment In multicellular organism the body of living is not in direct contact with the surroundings so diffusion is unable to meet the needs of that organism. Human beings are multicellular organisms having a complex body structure. The oxygen requirement in multicellular organisms cannot be met by diffusion because-\xa01) Diffusion is a slow process.\xa02) In multicellular organisms, the\xa0cells 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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