Across
- 1. waste gas produced by cells
- 7. the major tube leading to the lungs
- 10. a poisonous gas produced by smoking
- 11. the addictive chemical in tobacco
- 12. a disease which destroys the alveoli
- 13. air sacs which oxygen and co2 is exchanged
- 14. the tube that takes air to the lungs
Down
- 2. all of the organs needed for respiration
- 3. cause a physical dependency or strong disire
- 4. tiny branches inside of the lungs
- 5. tiny hairs in the nasal passages
- 6. disease which a tumor forms in the lungs
- 8. chemicals in cigarettes which leave a black film
- 9. the muscle under the lungs