Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans? | Unit-6 Science NCERT solution Class-10

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

 

Answer:-

The size of the multicellular organisms is very large compare to unicellular organisms. Diffusion is a passive mode of transport of substances and can transfer gases up to a very small distance only. This will not be sufficient for multicellular organisms’ needs.