The diaphragm flattens out and pulls forward, drawing air into the lungs for inhalation. ... Respiratory System: Facts, Function and Diseases; Sign up for the Live Science daily newsletter now.

The respiratory system is the organs and other parts of your body involved in breathing, when you exchange oxygen and carbon dioxide. All the cells in your body need oxygen to work.

The main function of the respiratory system is to draw air into the lungs to allow the exchange of gases with blood circulating to the lungs. This article has been updated. The evidence in this ...