There are 206 bones in human body. These bones are connected with skin, flesh and blood. Each body organ has its own special work and each organ contains several kinds of component. Brain and fibers of consciousness keep body in control. Component of digestion system as mouth, teeth, saliva, stomach and veins provides strength to the body. Our body keeps on working in all conditions. Cells of the body keep of destroying and new cells keep on taking birth in place of them. Such kinds of cells get supply through meal.