The 4 types of movable joints are:
1) Hinge joint - a joint that works like a hinge of a door. example: elbow joint
2) gliding joint - this joint allows a bone to slide over another, this joint is found in wrists and ankles.
3) pivot joint - a freely moving joint in which movement is limited to rotation. pivot joint in the neck located at its 1st and 2nd vertebrae. allows the head to move back and forth.
4) ball and socket joint - rounded end of one bone fits the cup like end of another bone. example is the glenohumeral joint in the shoulder.
