Why diffusion is insufficient to meet the oxygen requirement of multicellular organisms like a human?


Diffusion is insufficient to meet the oxygen requirement of multicellular organisms like a human-

Because, diffusion is a slow, passive transport process to cover the distance between the gas exchange surface and the sites where the oxygen is required.

Unlike unicellular organisms, multicellular organisms like a human have a body of the big volume, and hence, oxygen cannot diffuse into all the cells of the human body quickly by the process of diffusion.

Multicellular organisms have complex body structures that require specialized cells and tissues to perform these functions.

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Updated on: 10-Oct-2022

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