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Across 2. The major inorganic mineral salt found in bone matrix 3. Microscopic functional unit of compact bone 6. Process of replacing other tissues by bone; formation of bone by osteoblasts 8. Deposition of calcium (mineral) salts 9. Growth plate; area where bones increase in length 11. A cell that maintains the mineral content of the surrounding bone 12. Growth where bone increases in diameter 16. Ossification where bone develops from a cartilagenous model 17. Bone that consists of bars and plates known as trabeculae; cancellous bone 18. Layer of fibrous connective tissue that surrounds cartilagenous structures 19. Small bony struts that radiate out from ossification center 20. Dense bone that consists of parallel osteons

Down 1. Area where osteoprogenitor cells differentiate into osteoblasts 4. Formation of bone 5. The organic component of bone matrix 7. Ossification in which bone develops from a fibrous connective tissue membrane 10. Type of cartilage associated with endochondral ossification 13. Connective tissue covering of bone 14. A cartilage cell located in a lacunae 15. A cell that produces bone matrix