HUMAN HEART The human heart is an organ that pumps blood throughout the body via the circulatory system , supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes. The human heart has four chambers:

(1)  Saliva  produced in the mouth by salivary glands is of  alkaline nature . (2) Wrought iron  is the purest form of iron. (3) Oxides   of metals are basic in nature while those of nonmetals are acidic . (4) Neutralisation  reactions are always  exotherm…