What is the residual volume of the lungs?

The residual volume of the lungs refers to the amount of air that remains in the lungs after a maximal exhalation. This volume is crucial because it prevents the lungs from collapsing and ensures that there is always some air available for gas exchange, even between breaths.

A typical value for residual volume in an adult is approximately 1,200 ml. This volume can vary based on factors such as age, sex, body composition, and health status. It is specifically measured during pulmonary function tests to assess lung capacity and function.

Understanding this concept is vital in fields related to respiratory health, as knowing the residual volume helps clinicians interpret lung function and identify potential respiratory issues.