Biology for IGCSE & O level - Gas Exchange In Humans (Section 1 - No. 30)
Which of the following is an accurate comparison of inspired and expired air?
Inspired air contains less carbon dioxide than expired air.
Expired air contains more oxygen than inspired air.
Expired air contains more water vapor than inspired air.
Inspired air contains more oxygen than expired air.
Explanation
Exhaled air has more carbon dioxide and water vapour but less oxygen than inhaled air.
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