testing

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Across
  1. 5. long bones are derived from _____ ossification
  2. 6. _____ is bone formation
  3. 7. what does endochondral ossification develop from
  4. 9. ossification of long bones starts in the _____ month of prenatal development
  5. 10. collagen fibrils, hydroxyapatite crystals make up the _____ matrix
  6. 12. flat bones are derived from ____ ossification
Down
  1. 1. in intramembranous ossification, bones are made directly from ________ tissue
  2. 2. osteoblast, osteocytes, osteoclasts are ____ cells
  3. 3. _____ are responsible for cartilage formation
  4. 4. _____ is the membrane that surrounds the bone
  5. 8. _______ skeleton develops from lateral plate medoserm
  6. 11. _____ skeleton develops from paraxial mesoderm