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Lung Disease & Respiratory Health Center

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The lungs are the organs in the chest involved in breathing. The lungs are surrounded and protected by the rib cage. The lung on the left side of the body is a little smaller than the lung on the right.

The lungs transfer oxygen from the air to the bloodstream and remove carbon dioxide (a waste material) from the blood. When you breathe in, oxygen moves out of the air sacs of the lungs into the blood vessels. At the same time, carbon dioxide moves out of your blood and into the air sacs. You remove the carbon dioxide from your lungs when you breathe out. This process is called respiration.

ByHealthwise Staff
Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine
Specialist Medical ReviewerDennis L. Stevens, MD, PhD - Internal Medicine, Infectious Disease

Current as ofJune 4, 2014

WebMD Medical Reference from Healthwise

Last Updated: June 04, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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