Cartilage and muscle structure

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Across
  1. 3. Protein that makes up the thick myofilaments
  2. 5. Protein that covers the myosin binding sites
  3. 6. Cytopasm of a muscle fibre
  4. 7. Area consisting of only thick myofilaments
  5. 8. A cylinder of myofilaments within a muscle fibre
  6. 9. A globular protein forming thin myofilaments
  7. 12. Smooth ER of muscle fibres
  8. 14. Spaces occupied by bone and cartilage cells
  9. 17. Inorganic component of bone 70%
  10. 18. Globular protein on thin myofilaments that changes shape when calcium binds to it
  11. 19. Hyaline cartilage at the ends of long bones
  12. 21. Horizontal channels in bone contain blood vessels
  13. 22. Disease usually caused by lack of vit D
  14. 23. A multinucleate muscle cell
  15. 24. One contraction unit of a myofibril
  16. 25. Point of attachment for thin myofilament
  17. 26. Process of bone forming from cartilage
  18. 27. Point of attachement for thick myofilaments
Down
  1. 1. Protein in the matrix of cartilage
  2. 2. Thick and thin versions of these exist
  3. 4. cartilage cells
  4. 7. one unit of compact bone, an osteon
  5. 10. Part of a sarcomere that contains thin myofilaments
  6. 11. Plasma membrane of a muscle fibre (cell)
  7. 13. Protein forms the organic component of bone
  8. 15. Cytoplasm filled interconnecting tubules that surround bone cells
  9. 16. Genetic disease causes bone deformity
  10. 20. Region containing thick and thin myofilaments