Across
- 1. cells break down_
- 3. a joint is moved to far back it is _
- 8. _ are hard and tough
- 10. cells use _ and_
- 12. ribs connect to the _
- 13. _help lungs breathe
- 14. a human body can move because of _
- 16. _ and_ make up the skeletal system
- 19. the _ protects the brain
Down
- 2. collar shoulder hip bones are all _
- 4. inside these joints is a space filled with _
- 5. oxygen goes to _
- 6. _ pairs of ribs
- 7. blood carries _ to lungs
- 9. blood _ bring blood to the bones and back
- 11. a _ is softer layer=
- 15. _ is a softer material
- 17. a compact bone is a _
- 18. bones are made of _