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Muscle is a tissue type found in the bodies of animals . The purpose of muscle is to motivate the body, by means of applying force to the bones of the body. Muscles do this by contrating and relaxing. Muscles and muscular activity takes up a lot of the bodies energy comsumption.

The strength of a muscle is directly proportional to the cut off area of it. The strength of a body, however, is determined by biomechanical principles (the distance between muscle sockets, muscle size and so on).