Across
- 3. canal, blood vessels + nerves.
- 7. fibers, anchor periosteum to bone.
- 9. growth, bone growth in width.
- 11. small channels connecting osteocytes.
- 12. bone (lamellar) , dense, outer layer.
- 16. growth spurts then epiphyseal closure.
- 18. plate, (growth in youth)
- 19. storage, yellow marrow stores fat.
- 21. shaft; compact bone around medullary cavity.
- 23. concentric layers of matrix.
- 27. bone (cancellous) , contains trabeculae with red marrow.
- 30. marrow, fat storage; found in diaphysis.
- 31. growth spurts then epiphyseal closure.
- 32. organic, non-mineralized; collagen & proteoglycans.
- 34. shields organs (brain, heart, spinal cord).
- 37. mature cells maintaining matrix in lacunae.
- 39. (Haversian system), structural unit of compact bone.
- 41. ossification, develops from fibrous membrane (flat bones).
Down
- 1. build bone matrix.
- 2. line, (after growth)
- 4. ossification, bone replaces cartilage model (most bones).
- 5. (vitamin D), increases Ca²⁺ absorption.
- 6. inhibits osteoclasts → lowers blood Ca²⁺.
- 8. blood cell production in red bone marrow.
- 10. (parathyroid hormone) , ↑ osteoclasts → raises blood Ca²⁺.
- 13. storage , stores Ca²⁺ and phosphate.
- 14. area between diaphysis and epiphysis.
- 15. outer covering; pain fibers, blood vessels.
- 17. ends; spongy bone interior and articular cartilage.
- 20. spaces where osteocytes live.
- 22. , framework that holds the body upright.
- 24. bones act as levers for muscles
- 25. canals, connecting canals.
- 26. salts, hydroxyapatite; gives strength and hardness.
- 28. layer, dense irregular CT
- 29. marrow, produces blood cells.
- 33. osteogenic layer, osteoblasts + osteoclasts
- 35. break down (resorb) bone.
- 36. hormone, childhood growth.
- 38. growth, at epiphyseal plate
- 40. inner lining; covers trabeculae & canals.