1. Joints

2. Kinds of Joints
A joint is the part of the skeletal system where 2 or more bones meet.
Joints make it possible for the body to have a wide range of motion like twisting and bending.
Joints are padded with a rubbery tissue called cartilage.
Nobody knows why joints crack. It may be from tiny air bubbles that form in the joint, or from a tight tendon and ligament snapping over a bone when moving.
Cracking your joints on purpose can damage the joint surface.

3. Hinge Joint: allows the knee, knuckle, ankle, finger, & toe to bend.
Gliding or Sliding Joint: allows the wrist and spine to twist and bend.
Ball & Socket Joint: allows the hip & shoulder to swivel.
Pivot Joint: allows the elbow and neck to twist.
Brainpop:
Joint
RMA

4. 15. Draw diagram
Hinge joint

5. 15. Draw a diagram
Ball and socket joint

6. 16. Draw a diagram
Cartilage

7. Draw a diagram
Tendon