Across
- 3. tiny hairs in the nasal passages, bronchi, and trachea which help remove dust and dirt particles
- 5. the major tubes leading to the lungs
- 7. the chemicals in cigarettes which leave a black film on the lungs
- 8. the addictive chemical in tobacco
- 11. waste gas produced by cells
- 12. a disease which destroys the alveoli; smoking can cause it
Down
- 1. a disease in which a tumor forms in the lungs; smoking often causes it
- 2. the muscle under the lungs
- 3. a poisonous gas produced by smoking or auto exhaust
- 4. tiny branches inside of the lungs, which carry air to the alveoli
- 6. all of the organs needed for respiration (breathing)
- 9. air sacs through which oxygen and carbon dioxide are exchanged with the blood
- 10. causing a physical dependency, or very strong desire