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Respiratory System
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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:
June 13, 2011- Medical Review:
- E. Gregory Thompson, MD - Internal Medicine
W. David Colby IV, MSc, MD, FRCPC - Infectious Disease
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