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

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Solution

Diffusion is insufficient to meet the oxygen demand of multicellular organisms as they contain a large number of cells and all cells are not exposed to air directly. Diffusion is sufficient in unicellular organisms as they are exposed to air directly.

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

Q. Diffusion is insufficient to meet .......... requirement of multicellular organisms like humans.

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

why is diffusion in suficient to meet the oxygen requirements of multicellular organisms like humans?

(a) Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans ?
(b) What type of arrangement exists in the bodies of large animals to meet their oxygen requirements adequately ?
(c) What advantage a terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration ?

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