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Across 2. Which hormone is stimulated due to low levels of calcium in the blood? 4. Which bone cells are stimulated to degrade bone when blood calcium is to low? 7. Hormone produced by the pituitary which regulates body growth 8. Structural unit of a bone which functions as a weight bearing pillar 9. Another name for the metaphysis in a growing bone 10. Type of marrow responsible for blood cell production 13. Latticework of thin bone plates within spongy bone 14. Process of bone formation 15. Hormone produced by the kidneys which promotes calcium and phosphorus absorption 16. Hormones which include both estrogens and testosterone which stimulate closure of epiphyseal plate 17. Opening which runs through the center of an osteon containing small blood vessels and nerves 22. Small channels connecting lacunae to each other and the central canal 23. Hormone produced by the parathyroid which promotes calcium removal from bones by stimulating osteoclasts 24. A pelvis with a wide, oval-shaped opening would belong to which sex? 29. Sunlight is required for the body to synthesis enough of this vitamin? 30. Thin layer of cartilage covering the epiphysis 31. Ends of the bone 32. Type of bone which contains many large spaces and provides the greatest strength with the least weight 33. Region of a bone where the diaphysis joins the epiphyses 34. A skull with a prominent brow ridge and large mastoid process would belong to which sex? 36. Neurotransmitter produced by the intestine which inhibits osteoblast production and can lead to bone degradation 37. Hormone produced by the thyroid which promotes calcium deposition into bones by stimulating osteoblasts 38. Type of bone which contains few spaces and provides maximum amount of protection, support, and strenth 39. Type of marrow responsible for fat storage

Down 1. Rings located on the surface of the diaphysis, and surround it like bark on a tree 3. Layer of osteoblasts and osteoclasts lining the marrow cavity 5. Which bone cells are stimulated to form bone when blood calcium is to high? 6. Mature bone cells found in cavities within lamellae which function to maintain bone 11. A pelvis with a narrow, heart-shaped opening would belong to which sex? 12. Bone cells which breakdown bone 18. Each ring within an osteon 19. Hormone produced by the thyroid which also stimulates osteoblasts 20. Openings which are at right angles to the central canal and connect nerves and blood vessels to the body 21. Space within the diaphysis which contains yellow marrow 25. Bone cells which forms new bone 26. Which hormone is stimulated due to high levels of calcium in the blood? 27. Fibrous covering around a bone, where it is not covered by cartilage 28. Shaft of the bone 35. A skull with a smooth forehead region and small mastoid process would belong to which sex?