Across
- 3. speeds up the central nervous system
- 6. a sticky substance produced by burning tobacco
- 9. disease that permanently damages lung tissue
- 10. an addictive substance in tobacco products
Down
- 1. symptoms associated with stopping an addictive substance.
- 2. cancer causing agents
- 4. the voice box
- 5. air sacs where the exchange of oxygen and carbon dioxide takes place.
- 6. A plant used to produce cigarette and other products that contain nicotine.
- 7. a group of diseases that cause difficulty breathing
- 8. tobacco a smokeless tobacco product
- 11. the tiny hairs that help keep the respiratory clean