Across
- 5. is a poisonous gas produced by smoking.
- 6. __________ is a disease that was almost gone in this country and now its back.
- 7. _________ is an infection of the lungs. It makes mucus and pus.
Down
- 1. _______ is an infection of the bronchi.
- 2. Smoking harms the ____ because then they fill with fat.
- 3. _______ coats the bronchi and makes it hard to breathe.
- 4. Many people are allergic to ________.
- 8. ___________ destroys the alveoli and you can't fix it.