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.

Respiratory retractions refer to a drawing in of the muscles between the ribs when a person inhales. It indicates that someone is having difficulty getting enough air into their lungs. If ...

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 ...