Oxygen combines with hemoglobin in red blood cells to form oxyhemoglobin. Oxyhemoglobin reaches different parts of the body. Oxyhemoglobin breaks down in body cells and oxygen and hemoglobin are released. As a result, body cells get the necessary oxygen.
Hb4 + 4O2 → 4Hbo2
Actually hemoglobin reacts with 4 oxygen molecules to form Hb4o8.
Hb4 + O2 → Hb4o2
Hb4o2 + O2 → Hb4o4
Hb4o4 + O2 → Hb4o6
Hb4o6 + O2 → Hb4o8
This reaction is extremely fast and takes less than 0.01 second. Temperature, pH and red blood cell diphosphoglycerate affect this reaction.