Where does this water vapour come form in exhaled air?
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In addition, the blood contains some carbon dioxide (a waste product) that is transferred to the air in the lungs, which is then exhaled. The result is that the exhaled air contains less oxygen and more carbon dioxide than the inhaled air. The air in the lungs also becomes humidified with water before it is exhaled.
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You see exhaled air contains less oxygen and more carbon dioxide, it is also saturated with water vapour. Exhaled air contains 78% nitrogen and 17% oxygen. ... We exhale carbon dioxide. It is warm… on a cold day it condenses when the warm gas hits a cold gas( frigid air).
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