Muscular System
The Muscular System is a system in your body that contains all of your 640 muscles. These muscles are the smooth muscle, cardiac muscle and the skeletal muscle. Cardiac Muscles are different from other muscles because the muscle fibers are connected to each other and are only by the heart. Smooth muscles are controlled by the ANS ( autonomic nervous system) and are involuntary. Skeletal muscles are made up of skeletal muscle cells and most skeletal muscles are attached to bones of collagen.