What is hemoglobin? What is the inorganic element that is fundamental in the composition of hemoglobin?
Hemoglobin is the protein present in the blood responsible for the transport of oxygen from the lungs to the tissues and cells. The hemoglobin molecule is composed of four protein chains, each with a heme group containing an iron atom. The iron is responsible for the binding of oxygen in the lungs and also for the red color of hemoglobin and thus of the blood.
