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How do inhaled and exhaled air differ?

Answer:
The percentage of O2 and CO2 differ greatly in inhalation and exhalation. CO2 levels tend to be higher in exhaled air as it is a metabolic waste product. O2 levels tend to be lower in exhaled air as it is absorbed from the air and used by the metabolism.
First answer by ID2500141268. Last edit by Colors871. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].

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