Respiratory function is a branch of physiology that focuses on the study of how the respiratory system works to maintain adequate oxygen levels in the body and remove carbon dioxide. This includes the processes of breathing, gas exchange in the lungs, and the regulation of respiratory rate and depth. Researchers in this field may study the anatomy and function of the lungs, the mechanics of breathing, the control of respiration by the brain and nervous system, as well as disorders that can affect respiratory function such as asthma, chronic obstructive pulmonary disease (COPD), and sleep apnea. Understanding respiratory function is essential for diagnosing and treating respiratory conditions and promoting overall health and well-being.