The skeletal system is the framework of bones and cartilage that supports the body and protects vital organs. It consists of 206 bones in adults, which provide structure, enable movement, and store minerals like calcium and phosphorus. The skeletal system also produces blood cells in the bone marrow. In addition to bones, the skeletal system includes joints, which connect bones and allow for flexibility and movement. Cartilage cushions the joints and reduces friction during movement. Overall, the skeletal system plays a crucial role in maintaining the body's shape and facilitating movement.