The diagram shows the percentage of gases in inspired and expired air.
(a) Identify I, II, X, Y, and Z. I: Inspired air II: Expired air X: Oxygen (O₂) Y: Carbon dioxide (CO₂) Z: Nitrogen (N₂) (b) Why is gas X almost negligible in Figure I? Answer: Gas X (carbon dioxide) is negligible in inspired air because atmospheric CO₂ is present in very low amounts (0.04%). (c) … Read more