The skeletomuscular unit is a working concept of muscle and skeleton producing motion. The components of an S-M unit are: bones, a joint, and skeletal muscle(s).
Bones act as levers and as attachment sites for skeletal muscles.
Joint (Articulation) Label.
The joint is the center, fulcrum, point, or axis of motion.
Skeletal Muscle(s) Label.
Skeletal muscles apply the forces for motion. Any given motion utilizes a group of muscles working together.