Hemoglobin is a protein in red blood cells responsible for transporting oxygen from the lungs to tissues and organs throughout the body.
It consists of four globin protein subunits, each containing an iron-containing heme group that binds to oxygen. This reversible binding and release of oxygen enable efficient oxygen transport in the bloodstream.
Hemoglobin also plays a crucial role in carrying carbon dioxide back to the lungs for exhalation. Its structure and function are essential for maintaining the oxygen-carrying capacity of blood and overall physiological balance in the human body.
