What is the human gas exchange made up of?

Human gas exchange primarily involves the exchange of oxygen and carbon dioxide between the lungs and the bloodstream. Oxygen is inhaled into the alveoli, tiny air sacs in the lungs, where it diffuses into the blood and binds to hemoglobin in red blood cells. Conversely, carbon dioxide, a waste product of metabolism, diffuses from the blood into the alveoli to be exhaled. This process is essential for maintaining cellular respiration and overall metabolic function.