Question

why is diffusion insufficient to meet the oxygen requirement of multicellular organisms like humans

Answer 1

Since diffusion is a very slow process and it will require very large amount of time for oxygen to reach each and every part of the body. That is why diffusion is insufficient to meet the energy requirements of multicellular organisms like humans

Answer 2

HEYMATE!!!!

■ In multi - cellular organisms, all the cells may not be in direct contact with the surrounding environment.

■thus,simple diffusion will not meet the requirements of all the cells.

■In case of a single - celled organism, no specific organs for taking in food, exchange of gases or removal of wastes may be needed because the entire surface of the organism is in contact with the surrounding environment.

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