An introduction to the skeletal system:: skeleton has many function, but the most obvious is supporting the weight of the body. This support is provided by bones, structures as strong as reinforced concrete but considerably lighter. Unlike concrete, bones can be remodeled and reshaped to meet changing metabolic demands and patterns of activity. Bones work with muscles to maintain body position and to produce controlled, precise movements. With the skeleton to pull against, contracting muscles can make us sit, stand, walk, or run.