Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Expiration
Introduction
Exhalation (or expiration) is the movement of air out of the bronchial tubes, through the airways, to the external environment during breathing.
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.
External links
- Exhalation at the US National Library of Medicine Medical Subject Headings (MeSH)
- Template:EMedicineDictionary
- Essentials of Human Physiology by Thomas M. Nosek. Section 4/4ch2/s4ch2_14.
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]