Question

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

Answer 1

Answer:

diffusion is a slow proces

Explanation:

this means time taken for oxygen to circulate to all body is more

Answer 2

diffusion insufficient to meet the oxygen required of multicellular organisms like humans because human have such a large body and all the cells are not directly linked to environment and also diffusion is slow process to cover a large distance in human body . diffusion is slow process to carry the distance between the gases exchange such as the sites where oxygen is required.