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

    Sumit Saini 19th Jul, 2020
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    Sumit Saini 19th Jul, 2020

    Diffusion is a slow process and cannot supply oxygen quickly enough to all cells in large multicellular organisms because not all cells are in direct contact with the environment. Hence, humans have specialized respiratory and circulatory systems to transport oxygen efficiently.

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