Question

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

Answer 1

diffusion is insufficient to meet the oxygen because we are multicellular organisms and in our body many reaction are going continuously and we require a continuous flow of energy

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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