Question

In higher animals, respiration occurs through _______.​

Answer 1

Explanation:

simple unicellular animals like Amoeba, respiration takes place by the simple diffusion of gases through the cell membrane. Most of the animals have, however, specific organs for respiration. The animals like earthworms which live in the soil use their skin to absorb oxygen from air and remove carbon dioxide.

Answer 2

Explanation:

In simple unicellular animals like Amoeba, respiration takes place by the simple diffusion of gases through the cell membrane. Most of the animals have, however, specific organs for respiration. The animals like earthworms which live in the soil use their skin to absorb oxygen from air and remove carbon dioxide.

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