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