When you breathe, the airway (respiratory) system supplies oxygen to your blood. Then your blood takes oxygen to all parts of the body.
The nose, mouth, throat (pharynx and larynx), and hollow spaces in the cheeks and around the eyes (sinuses) make up the upper respiratory tract. The windpipe (trachea), breathing tubes (bronchial tubes and bronchioles), and structures inside the lungs make up the lower respiratory tract.
| By | Healthwise Staff |
| Primary Medical Reviewer | John Pope, MD - Pediatrics |
| Specialist Medical Reviewer | Thomas Emmett Francoeur, MDCM, CSPQ, FRCPC - Pediatrics |
| Last Revised | July 9, 2010 |
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
