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The Muscular system is the organ system whose primary function is movement and flexibility. The muscular system is made up of the muscles that let you move. There are three kinds of muscle in your body. Smooth muscle moves food through the digestive system.Cardiac muscle pumps blood throughout the body.he Muscular system is the organ system whose primary function is movement and flexibility. The muscular system is made up of the muscles that let you move. There are three kinds of muscle in your body. Smooth muscle moves food through the digestive system.
The main organs in the skeletal system are bones.    Their functions are to protect the bodies organs, and keep our  shape the skull protects the brain from brain dama â¦ ge.he main functions for the circulatory system's organs are the heart,blood cells,lungs,veins,and cells.