Across
- 1. protects the brain
- 4. carries electrical signals
- 5. connects bone to bone
- 7. pumps blood
- 9. largest organ
- 10. returns blood to the heart
- 12. longest bone
- 13. type of bone: patella
Down
- 1. vertebral column
- 2. middle layer of the skin
- 3. where to bones meet
- 6. connects muscle to bone
- 8. carries blood away from the heart
- 11. top layer of skin