II A skeleton cannot move without muscles to work the joints.
Human skeletons are internal ones called endoskeletons .
The skeleton is a system of bones, ligaments, muscles, tendons and other tissues that are linked together. The structure of the skeleton The different types of body joint Muscles in movement 1. It helps a person move Muscles are attached to this frame. Muscle is an elastic tissue with a rich blood supply and nerves. This tissue covers large areas of the body.