Exhalation

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Look up exhalation, expiration in Wiktionary, the free dictionary.

Exhalation (or expiration) is the movement of air out of the bronchial tubes, through the airways, to the external environment during breathing out.

Exhaled air is rich in carbon dioxide, a waste product of cellular respiration during the production of ATP.

Exhalation has a complementary relationship to inhalation; the cycling between these two efforts define respiration.


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  • This page was last modified on 13 December 2008, at 20:26.

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