The skeletal system consists of 206 bones and a network of tissues that connect them. It performs vital functions of support, movement, protection of organs, blood cell production, calcium storage, and hormone regulation. The skeletal system includes the skull, spinal cord, rib cage, shoulders, hips, and bones in the hands and feet. Cartilage cushions the ends of bones at joints like knees, elbows, and vertebrae. Ligaments and tendons connect bones to other bones and muscles to facilitate movement. The skeletal system enables the human body to survive through these various structural and functional roles.