In humans, the amount of O₂ in the air exhaled during respiration is 16%. Exhaled air contains a lower concentration of oxygen compared to inhaled air because oxygen is absorbed by the body’s tissues during cellular respiration.
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In humans, the amount of O₂ in the air exhaled during respiration is 16%. Exhaled air contains a lower concentration of oxygen compared to inhaled air because oxygen is absorbed by the body’s tissues during cellular respiration.