Blood is the most essential part of our body. It helps the body in transporting ions, molecules, proteins, fats and the most imperative one is oxygen. Oxygen is the most important element of our body. It also carries all the nutrients used by the body for its growth and nourishment. The major components of blood are red blood cells, white blood cells, platelets and a large number of proteins, ions and fats.

Hemoglobin is the most integral protein of blood. It helps in the formation of red blood cells. It is consist of four molecules of oxygen. In the centre of hemoglobin molecule, iron is present. It binds the oxygen with it. The main functions of hemoglobin are to bring oxygen from lungs to the capillaries and carry hydrogen and carbon dioxide out of the cells to the lungs. If there is any disturbance in the formation of the hemoglobin, it will cause disorder in the configuration of red blood cells

This ultimately results the diseases like anemia, sickle cell, cyanosis, thalassemia and rupture of red blood cells. There are further many types of hemoglobin. Like hemoglobin A, hemoglobin F, hemoglobin A2. Hemoglobin A is present in all adults, start forming in the bone marrow just after 12th week of birth. Hemoglobin F is present in fetus. But it is replaced by hemoglobin A after some time. Hemoglobin A2 is present in the patients of diabetes millets. It is formed by glycol tic pathway. In simple words, in this hemoglobin the molecule of glucose get attached with the iron of hemoglobin. This can be congenital. As far as blood is the most vital part of our body therefore precautions should be taken during blood transfusion.


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