Across
- 5. Top of skin
- 7. Brain stem
- 9. Breathing muscle
- 10. Cardiovascular Center
- 13. Visual center
- 14. Heart sack
- 17. Wind pipe
- 18. Air tubes
Down
- 1. Air sacks
- 2. Layer of skin
- 3. Main pipe
- 4. Little air tubes
- 6. Throat
- 8. Protects the larynx
- 11. Pump
- 12. Heart nerve
- 15. Skin Cancer-Bad
- 16. Vocal chords