The muscular system is responsible for the movements in the human body.
Whether volunary or involuntary,these movements are all necessary in keeping humans alive.
There are about 700 named muscles, which compose about half of a person's body weight. They are composed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.
Without the muscular system, the human body would not be able to function. There would be no way to look around or to take a step. The heart would not beat, food would not be digested, and I would not be able to type this information.