Bones, Muscles and Joints

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Across
  1. 4. cartilage gradually becoming a bone
  2. 5. bone cells
  3. 9. joints in hip and the shoulder
  4. 10. a muscle in the arm
  5. 11. the middle of a long bone
  6. 12. lower back vertebra
  7. 14. chest vertebra
  8. 15. neck vertebra
  9. 18. protects brain
  10. 19. five vertebrae fused
  11. 21. muscle attached to the moving bone
  12. 22. muscle that work in pairs
  13. 23. the joint is surrounded by a tough fibrous .....
  14. 24. end of a long bone
  15. 25. a bone that produces red blood cells
Down
  1. 1. connects two bones
  2. 2. a role of the skeletal system
  3. 3. the bones ......... at joints
  4. 6. secreted by the synovial membrane
  5. 7. the outer surface (covering) of the bone
  6. 8. connects muscle to the bone
  7. 13. osteocytes are arranged in rings
  8. 15. outside hard material of long bone
  9. 16. muscle attached to the stationary bone
  10. 17. a movable joint
  11. 20. cartilage cells