Describe clearly the exchange of gases that occur between the air in the alveoil and the bloodstream?

In the alveoli, oxygen from the inhaled air diffuses across the alveolar membrane into the bloodstream, where it binds to hemoglobin in red blood cells. At the same time, carbon dioxide, a waste product, diffuses from the bloodstream into the alveoli to be exhaled. This exchange of gases is facilitated by the concentration gradients of oxygen and carbon dioxide between the alveoli and the blood.