MICROANATOMY

Detailed explanation-1: -Hemoglobin (Heme + Globin) The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood. It is composed of four subunits, each with a heme group plus a globin chain.

Detailed explanation-2: -Hemoglobin is the protein that carries oxygen and exists within each red blood cell. If your red blood cell was a vehicle, hemoglobin is in the driver’s seat, picking up oxygen at the lungs and transporting it to the tissues throughout your body.

Detailed explanation-3: -Oxygenated blood returns to the heart and is distributed throughout the body by way of the systemic vasculature. Oxygen is carried in the blood in two forms. The vast majority of oxygen in the blood is bound to hemoglobin within red blood cells, while a small amount of oxygen is physically dissolved in the plasma.

Detailed explanation-4: -Each iron atom binds to one oxygen molecule. Therefore, each hemoglobin molecule has four oxygen binding sites. Consequently, each molecule of hemoglobin carries four oxygen molecules, which makes it a very efficient way to transport oxygen.