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Radiation always has damaging affects on the body. But, when used in a controlled manner, it can be used to...Read more
The digestive system is the body systems which provides strength and energy to the body. It is the only route...Read more
Saliva is the first secretion of the digestive system. As it is secreted only in the mouth. Here are 5...Read more
Moon is the only satellite of the earth. It revolves around the earth and also around itself. It takes 29.5...Read more