Introduction :

      During the actions of every moment, living cells of the body are involved in the work of transformation of chemical and energy continuously for keeping the body alive and healthy. All these activities of cells are called metabolism extensively. Metabolism sustains the life and progresses homeostasis of the body.

Below mentioned activities are included in the metabolism:

          Changing nutrients into energy and power which is used by the tissues of the body, production of nucleic acid, synthesis of protein, physical formation of cells and cells’ structures, expulsion of rubbish substances and production of heat which helps in controlling body temperature are included in it.

          All the activities of the body depend on the nutritive elements or chemical components which supply energy and physical substance according to the requirements of the body.