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Respiratory system

Respiratory system

Illustration of the respiratory system

The upper respiratory tract (upper airway) consists of the nose, mouth, sinuses, and throat. The lower respiratory tract consists of the trachea, bronchial tubes, and the structures inside the lungs.

Last Updated: August 2, 2007
Medical Review: Caroline S. Rhoads, MD - Internal Medicine
W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information.
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