The musculoskeletal system consists of skeletal, muscular and articular systems working together for body movement. The skeletal system includes bones and joints, with the axial skeleton forming the central core and appendicular skeleton in the limbs. Bones provide structure, protect organs, allow movement, store minerals, and attach muscles. There are several bone types classified by shape and composition. Bones are living tissues that continuously remodel through the actions of osteoblasts, osteocytes, and osteoclasts. The skeletal system can be affected by diseases like osteoporosis, Paget's disease, rickets/osteomalacia, osteomyelitis, developmental abnormalities, and bone tumors.