Oxygen diffuses across the alveolar and capillary partitions to the bloodstream, binding to hemoglobin in crimson blood cells. At the same time, carbon dioxide, a byproduct of mobile metabolism, diffuses with the blood in the alveoli to get exhaled. b(1) : the circulation and Trade of gases during the lungs https://ventilation-ductwork78890.blogs100.com/38112115/the-ultimate-guide-to-ventilation