Why do we say exhaled air is rich in carbon dioxide and not oxygen although exhaled air consists more percentage of oxygen.
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Answer: 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. This is because our cells use oxygen from the inhaled air to release energy and give out carbon dioxide as a byproduct
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the amount of inhaled air contains 21% of oxygen 0.04% of carbon dioxide while the air we breathe out contains 16.4 percent of oxygen and 2.4 % of carbon dioxide.
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