Question

Why does inhaled air contain more oxygen than exhaled air?​

Answer 1

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Because the air inhaled is used up by our body cells for respiration.. Therefore exhaled air contains less oxygen than inhaled air because it has more of carbon dioxide which is one of the by products of respiration.

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Answer 2

When we exhale, the composition of the air remains almost the same as the air we inhale, only the percentage of carbon dioxide and oxygen changes. The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide.

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