body movement

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Across
  1. 4. bones meet at this place
  2. 6. the framework of bones
  3. 7. slithers
  4. 9. made up of 33 vertebrae
  5. 11. the joint where our head joins the neck
  6. 12. 3 pairs of legs
Down
  1. 1. snail uses this for movement
  2. 2. joint in elbow
  3. 3. protects our lungs and heart
  4. 5. keeps our body healthy
  5. 7. ball and socket joint
  6. 8. fixed joint
  7. 10. extends and shortens its body for movement