PATHOLOGY

Detailed explanation-1: -The iron atom in the heme in hemoglobin is in the Fe(II) ferrous state to allow for reversible binding of iron with molecular oxygen, which completes the octahedral coordination of the central iron atom.

Detailed explanation-2: -Oxygen binds reversibly to haem, so each haemoglobin molecule can carry up to four oxygen molecules. Haemoglobin is an allosteric protein; the binding of oxygen to one haem group increases the oxygen affinity within the remaining haem groups.

Detailed explanation-3: -It is the iron atom that binds oxygen as the blood travels between the lungs and the tissues. There are four iron atoms in each molecule of hemoglobin, which accordingly can bind four molecules of oxygen.

Detailed explanation-4: -Iron is an essential element for blood production. About 70 percent of your body’s iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin.