Across
- 4. special cell that cleans up debris, bacteria
- 5. special cell that moves mucus out of lungs
- 7. special cell that produces surfactant
- 9. the voice box
Down
- 1. special cell that facilitates gas exchange
- 2. special cell that produces sticky mucus
- 3. the group of organs that are involved in breathing
- 6. where the bronchi are located
- 7. passage for air to go to the lungs
- 8. part of both digestive and respiratory system