The skeletal system has both mechanical and physiological functions. Mechanical functions include support, protection, and movement. The bones of the skeletal system provide the rigid framework that supports the body. Bones also protect internal organs such as the brain, heart, lungs, and organs in the pelvic area. Muscles are anchored to bones and act as levers at the joints, allowing for movement. Physiological functions of the skeletal system include the production of blood cells and the supplying and storing of important minerals.