1. Welcome to... A Game of X’s and O’s

2. Presentation by © 2008 - All rights Reserved massagenerd@yahoo.com

3. Mark E. Damon Created this program © 2000 - All rights Reserved markedamon@hotmail.com

4. Bones

5. 789 456 123

6. 789 456 123 Scoreboard X O Click Here if X Wins Click Here if O Wins

7. 1 How many bones in the adult body?

8. 1 206 Home

9. 2 Bone tissue becomes brittle, thin, and spongy. Bones break easily, and the spine sometimes begins to crumble and collapse.

10. 2 Osteoporosis

11. 3 usually strikes active teens around the beginning of their growth spurts, the approximately 2-year period during which they grow most rapidly.

12. 3 Osgood-Schlatter disease

13. 4 when the cartilage is replaced by hard deposits of calcium phosphate and stretchy collagen, the two main components of bone.

14. 4 Ossification

15. 5 The bones of kids and young teens are smaller than those of adults and contain "growing zones" called ____________

16. 5 Growth Plates

17. 6 Cells that make new bone and helps repair damage

18. 6 Osteoblasts

19. 7 Cells that break down bone and help to sculpt and shape it.

20. 7 Osteoclasts

21. 8 Cells carry nutrients and waste products to and from blood vessels in the bone.

22. 8 Osteocytes

23. 9 __________ is needed to make bones hard, which allows them to support your weight.

24. 9 Calcium