Skeletal system

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Across
  1. 1. openings or grooves that allow nerves to enter bone
  2. 5. one of the lower leg bones
  3. 6. jelly like substance in the middle of long bones
  4. 7. inhibits osteoclasts activity
  5. 10. bone formation
  6. 11. site of compact bone in the adult
  7. 13. the nine that helps protect your heart
  8. 16. one of the forearm bones
  9. 19. one of the forearm bones
  10. 20. where two bone surfaces come together
  11. 21. fibers that attach to muscle bone
Down
  1. 2. site of spongy bone in adult
  2. 3. small channel or canal in bones
  3. 4. area of the bone that projects above the surface of bone
  4. 8. something that joins muscles to bones
  5. 9. the bone at the end of your knee
  6. 12. the upper arm bone
  7. 14. the largest bone in the human body
  8. 15. another name for your collar bone
  9. 17. stimulates absorption of calcium and phosphate
  10. 18. osteoblasts that have calcified