Where does blood oxygenation occur during inspiration?

Gas exchange takes place in the lungs of terrestrial organisms. The blood is saturated with oxygen as it passes through the capillary network. Heme is responsible for oxygen transfer. It is an integral part of hemoglobin, which is only 4%. Hemoglobin makes up red blood cells. In addition to oxygen bonds, erythrocytes create a bond with carbon dioxide. It is formed during the third stage of energy metabolism within cells. Mitochondria oxidize organic matter with oxygen. This is the process of cellular respiration of organisms.