Question

why is diffusion insufficient to meet the oxygen requirements of multi cellular organisms like humans?​

Answer 1

Answer:

Explanation:

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. Diffusion, being a slow process will take a lot of time to circulate oxygen to all the body cells. Hence, diffusion is insufficient to meet the oxygen requirements of multicellular organisms like humans.

Answer 2

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In multicellular organisms like humans, possess complex body designs. They have specialized cells and tissues for performing various necessary functions of the body such as intake of food and oxygen. Unlike unicellular organisms, multicellular organisms' cells are not in contact with the outside environment for respiration. Therefore diffusion cannot meet oxygen requirements of multicellular organisms

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