Students may answer legs, lungs, and heart. Help them to the conclusion that the muscles are what allow the movement. Explain that the muscular system is made up of muscles and tendons that support your skeleton, allowing your body to move. Muscles are strong, flexible tissues that make the body move by tightening and relaxing. There are more than 600 muscles connected to your skeleton.
Tendons are strong bands of material that attach muscles to bones or other parts of the body.
Remind students that when they eat beef, pork, chicken, etc. Tendons are also visible. Explain that ligaments are other bands of strong tissue that connect bones or hold an organ in place. They are part of the skeletal system. Explain that exercise is important to good health of muscles and the entire body.