Question

Q.1 why gaseous exchange by diffusion does not occurs in humans/and others large animals.​

Answer 1

Answer:

gaseous exchange occur in all organisms, including humans and animals by inhaling and exhaling which in short is respiration.

hope my answer helps you

Answer 2

Explanation:

as humans are multicellular organisms , every cell need to get sufficient oxygen . by diffusion every cell can't get sufficient oxygen.