Across
- 2. type of fracture in which the bone pierces the skin
- 4. protect vital internal organs, including the heart
- 5. lower jaw
- 7. where red blood cells are created
- 10. bone destroying cells
- 11. gaps between bones in a baby's skull
- 12. strengthens bones and prevents breakage by regular use
- 14. your skeletal system is replaced roughly every _______ years
Down
- 1. biggest and strongest bone
- 2. flexible connective tissue that acts as a cushion between bones at joint
- 3. bone mass decreases, causing brittle bones
- 6. connect bone to bone
- 7. upper jaw
- 8. bone building cells
- 9. connect muscle to bone
- 13. hardest substance in the body