Respiratory system
Air is breathed in through the nasal passageways, travels through the trachea and bronchi to the lungs.
Revision
Last reviewed 10/9/2012 by Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, and Stephanie Slon.
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