The locomotor system is made up of the skeletal system and the muscular system.
-Skeletal System-----
Bones: there are 206. They are hard and solid.
Joints: where 2 bones meet.
Ligaments: Join together bones and joints.
-Muscular System---
Skeletal muscles: they are voluntary muscles. We choose to move them.
Smooth muscles: they are involuntary. We don't choose to move them.
Cardiac muscles: they are in the heart. They contract automatically.
Tendons: they attach muscles to bones.