The primary function of the respiratory system in gas exchange is to facilitate the transfer of oxygen to the bloodstream and the removal of carbon dioxide from the body. This process occurs in the alveoli, tiny air sacs in the lungs, where oxygen diffuses into the blood, and carbon dioxide diffuses out. By maintaining proper gas exchange, the respiratory system supports cellular respiration, which generates energy for various bodily functions. Additionally, effective respiratory function is vital for overall health, as inadequate gas exchange can lead to serious health issues.