The Skeleton

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Across
  1. 3. the ___, ischium and pubis form hip bones
  2. 6. an external skeleton
  3. 8. ____ cavity: socket into which humerus fits
  4. 9. last four vertebrae which are fused together
  5. 10. made of 8 flat bones that enclose the brain
  6. 13. the second vertebra - makes head rotation possible
  7. 15. ribs attached directly to sternum
  8. 17. bones of the toes and fingers
  9. 19. five bones that form the palm of the hand
  10. 21. largest bone in the body
  11. 22. ribs attached to previous ribs with cartilage
Down
  1. 1. ____ magnum: an opening at the base of the skull
  2. 2. larger bone in the lower leg
  3. 4. also known as collarbone
  4. 5. an internal skeleton
  5. 7. five vertebrae fused found above the coccyx
  6. 11. forearm bone nearest the thumb
  7. 12. also known as the heel bone
  8. 14. large, flat, triangular bone
  9. 16. last 2 pairs of ribs not attached to sternum
  10. 18. the first vertebra - articulates with the skull
  11. 20. also called the knee cap