What is the percentage of carbon dioxide in inspired air?
0.0004
The percentage of carbon dioxide (CO2) in inspired air is relatively low, at around 0.04%. This is because the air that we inhale primarily contains oxygen and nitrogen, with trace amounts of other gases such as argon, neon, and helium. Carbon dioxide is produced by the body as a waste product of metabolism, so the air that we exhale contains a much higher concentration of CO2 (around 4%).
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