Question

Why is diffusion insufficient to meet the oxygen requirements of multi_
cellular organisms like humans?
WYTS​

Answer 1

Answer:

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans? ... Since these cells are not in direct contact with surrounding environment, simple diffusion cannot meet the oxygen requirement of all these cells.

Answer 2

it takes a lot of time to reach oxygen in every part of human being as diffusion is a slow process.so ,diffusion is insufficient to meet the oxygen requirements of multicellular organisms like humans.