Question

why does the process of diffusion is insufficient to meet the oxygen requirement of large multicellular organism..?​

Answer 1

Answer:

Diffusion is insufficient to meet the oxygen requirement of multicellular organisms like human because all the cells are not direct contact in environment and diffusion is a slow process. Diffusion is too slow to cover the distance between the gas exchange surface and the sites where the oxygen is required.

Answer 2

Explanation:

large animals require larger amount of energy but diffusion gives very less energy so , it is certain only to micro organisms .