Respiratory System

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.

ByHealthwise Staff
Primary Medical Reviewer E. Gregory Thompson, MD - Internal Medicine
Anne C. Poinier, MD - Internal Medicine
Adam Husney, MD - Family Medicine
W. David Colby IV, MSc, MD, FRCPC - Infectious Disease

Current as ofDecember 6, 2017

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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