Respiratory system

When you breathe in, air first travels through the nasal passageway or mouth, through the trachea, which further divides into bronchi, then smaller bronchioles, finally ending in the tiny air sacs (alveoli) in the lungs.

Review Date: 04/21/2006
Reviewed By: A.D.A.M. Medical Illustration Team. Previously reviewed by Allen J. Blaivas, D.O., Division of Pulmonary, Critical Care, and Sleep Medicine, University Hospital, Newark, NJ. Review provided by VeriMed Healthcare Network (5/6/2004).

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