Across
- 7. tiny "grapelike" sacsof lung tissue
- 8. oxygen & glucose undergo chemical reactions
- 10. throat
- 11. voice box
- 12. removal process of wastes
- 15. major organs of the excretory system
- 16. dark, sticky substance forms when tobacco burns
Down
- 1. windpipe
- 2. serious disease damaging lung tissue
- 3. large, dome-shaped muscle important to breathe
- 4. tiny filtering factories removes wastes
- 5. dependence on tobacco
- 6. dangerous drug found in tobacco
- 9. chemical that comes from the breakdown of proteins
- 11. main organs of the respiratory system
- 13. monoxide, colorless odorless gas burnt tobacco
- 14. cells that line the nasal cavities