Across
- 4. thin membrane that line store medullary cavity
- 8. process of bone deployment; cartilage is replaced by bone through childhood
- 9. condition characterized by abnormally low levels of calcium
- 10. function of skeletal system; structural framework
- 12. condition characterized by abnormally high levels of calcium
- 13. bone segments are pulled apart as a result of twisting action; fracture
- 15. function of skeletal system; protects the most important informal organ from injury
- 17. Storage yellow bone marrow; consists of adipose cells
- 18. active form of vitamin D; produced by the kidneys; stimulates the absorption of calcium and phosphate from the digestive tract
- 19. mature bone cells; main cells; exchange nutrients and waste with blood
- 20. markings the surface feature of bones; depends on the function and location of the body
Down
- 1. produced by pituitary gland; controls bone growth
- 2. hollow; space within diaphysis; contains yellow bone marrow
- 3. a partial fracture in which only one side of the bone is broken
- 5. estrogen from the ovaries in girls; testosterone from the testes in boy
- 6. process where the matrix is reabsorbed on one surface of a bone and deposited on another
- 7. straight across a long axis of the bone; fracture
- 11. produced by the parathyroid glands; stimulates osteoclast proliferation and activity
- 14. initiate calcification; bone building cells
- 16. inhibits osteoclast activity and stimulates calcium uptake by the bones