Question

Give one reason why multicellular organisms require special organs for
exchange of gases between their body and their environment. :

Answer 1

Answer:

because there body cells are not exposed to environment.

and diffusion is not enough as 1molecule O2 will take 3 years to reach from lungs to toe

Answer 2

Multicellular organisms require special organsfor the exchange of gases between their body and the environment because the body of multicellular organisms are very big and complex, so breathing through diffusion is not possible as it may take 3 years for the oxygen to reach the whole body. Therefore, multicellular organisms require special organs for the exchange of gases so that it will take very less time to reach the whole body...

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