Question

1. Why is air necessary for animals?
Answer
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Answer 1

Answer:

Animals need oxygen from air to carry out the reactions that release and transform energy from food. Carbon dioxide is released as a waste product during these processes. In mammals, including humans, air enters the body through the nose and mouth, and moves into the lungs.

Answer 2

Explanation:

Animals need oxygen from air to carry out the reactions that release and transform energy from food. Carbon dioxide is released as a waste product during these processes. In mammals, including humans, air enters the body through the nose and mouth, and moves into the lungs.

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