bones and hinges

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Across
  1. 1. this protects the brain
  2. 3. the joint that allows only little movement
  3. 5. the joint that allows no movement at all
  4. 6. the bone that protects the heart and lungs
  5. 7. the scientific words for the spin
  6. 10. the scientific word for fingers
  7. 11. the joint that the hinge joint could be known as
Down
  1. 1. the scientific word for ball and socket joints
  2. 2. the scientific word for the knee bone
  3. 4. the scientific word for the funny bone
  4. 8. the thing that fixed joints are connected by
  5. 9. the largest hinge joint in the body