What is the main function of the respiratory system?

The primary role of the respiratory system is to facilitate the exchange of gases between the body and the environment, specifically by enabling breathing. This process involves inhaling oxygen, which is essential for cellular metabolism, and exhaling carbon dioxide, a waste product of that metabolism. The respiratory system consists of various structures, including the lungs, trachea, and diaphragm, that work together to ensure this vital exchange occurs efficiently. By providing oxygen to the bloodstream and removing carbon dioxide, the respiratory system supports overall physiological functions and maintains homeostasis within the body.