Students may answer legs, lungs, and heart. Help them to the conclusion that the muscles are what is allowing 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. They are of different shapes and sizes, according to the job that they do.
Tendons are strong bands of tissue that attach muscles to bones or other parts of the body.
Explain that ligaments are bands of strong tissue that connect bones or hold organs in place. They are part of the skeletal system. Explain that exercise is important to good health of muscles and the entire body. Exercising muscles increases balance, strength, agility, and flexibility, which all help muscles to function better. It also helps to prevent injury to muscles and tendons, keeps the body healthy and strong, and helps the lungs and heart to work more efficiently.