Rheumatoid arthritis, or RA, is a chronic inflammatory disease of the joints that gradually reduces and disables joint movements. It is also known to affect an individual symmetrically. For instance, pain and inflammation of knee joints will appear together in the left and right leg.

A human body is a very complicated system. It is made up of very small functional units called as cells. Theses cells organize into various body parts to perform various activities, whether it is the joints in the hands or the blood circulation. They are also involved in the human immune system. The blood maintains the immune system of the body through its white blood cells, which are anti-bodies. They function towards fighting the foreign bodies or