Bone Crossword

2. Tiny canals that radiate from the central canals to the lacunae, carrying nutrients and wastes
4. Bone-building cell that forms the bony "collar" around a cartilage model
5. Mass of repair tissue that splints a broken bone, first fibrocartilage and later spongy bone
8. Tiny cavities in the matrix that house mature bone cells
11. Kind of growth that widens a bone as osteoblasts add matrix to the outside of the diaphysis
12. Structural and functional unit of compact bone, made of a central canal and matrix rings
13. Blood-filled swelling that forms first when a break ruptures blood vessels

1. Childhood disease in which bones fail to calcify and the legs may bow, often from too little vitamin D
3. Realignment of broken bone ends, done as a closed or open procedure
4. Process in which hyaline cartilage models are replaced by bone matrix as a fetus develops
6. Glands in the throat that release PTH when blood calcium drops below its normal level
7. Giant bone-destroying cell that PTH activates to release calcium ions into the blood
9. Lining of the medullary cavity where osteoclasts remove bone from the inner wall of the diaphysis
10. Type of cartilage that makes up most of an embryo's skeleton and serves as the model for bone