Humans Need Air

1. Air is another basic need of humans.

2. Humans need air to breathe during respiration.

3. During the process of respiration, we breathe in oxygen and breathe out

carbon  dioxide.

4. We need oxygen to produce energy in our body.

More to Learn 20% of the air is made up of  oxygen. Inhale means breathing in. Exhale means breathing out.

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