The main function of the skeletal system is to provide structural support, protect vital organs, and facilitate movement. Composed of bones, cartilage, and connective tissues, the skeletal system creates a framework for the body, allowing it to maintain its shape. It serves as a protective barrier for essential organs, such as the brain, heart, and lungs. Furthermore, the skeletal system works with muscles to enable locomotion and various movements. It also plays critical roles in mineral storage, blood cell production in bone marrow, and overall metabolic functions.