Across
- 2. breaks down fuel with acid
- 3. filters and humidifies air
- 4. largest organ of the body
- 7. has 4 chambers
- 9. detoxifies the blood
- 10. protected by the skull
- 11. emits carbon dioxide
- 12. primarily processes vibrations
Down
- 1. produce blood cells
- 3. transmits electrical signals
- 5. bean-shaped
- 6. longest and strongest bone in the body
- 8. protects lungs and heart