The upper respiratory tract (upper airway) consists of the nose,
mouth, sinuses, pharynx (upper section of the throat), and voice box (larynx).
The lower respiratory tract consists of the windpipe (trachea), bronchial
tubes, and lungs. The bronchial tubes carry air into the lungs and branch into
smaller and smaller bronchioles. These end in alveoli (air sacs).
The main function of the respiratory system is to supply the blood
with oxygen so the blood can deliver oxygen to all parts of the body.
The respiratory system does this through breathing.
ByHealthwise Staff Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine Adam Husney, MD - Family Medicine Specialist Medical ReviewerRobert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology
Medical Review:
E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology
This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.