Question

why diffusion insufficient to meet the oxygen requirements of multicellular organism like human

Answer 1

the unicellular organisms are in the direct contact of environment therefore diffusion is sufficient for those organisms which have single cell. diffusion is not sufficient for multicellular organisms because they are not in the direct contact of environment. multicellular organisms need more oxygen rather than unicellular organisms therefore this can be the second reason that diffusion is not sufficient for these organisms.
I HOPE IT HELPS.....

Answer 2

Hey dear buddy..
Here's is ur answer ^______^.

✔diffusion is insufficient to meet the oxygen requirements in multicellular organisms becoz the process of diffusion is very slow and the body of multicellular such as human is big. Soo diffusion take long time in human. Soo it insufficient to meet the oxygen requirements in human.

Dear:) hope its helps ☺