Across
- 2. inside the respiratory zone the ______ are located
- 5. flap that closes over the glottis to prevent food from entering the lungs
- 7. epithelial cells have hair-like projections on their surface called _____
- 9. smaller airways that repeatedly branch off
- 10. transport air from the nostrils to the respiratory tract
- 11. a tube that carries air to and from the lungs
Down
- 1. bronchioles do not have _________
- 3. each lung contains a different number of _____
- 4. also known as nares
- 6. goblet cells in between the epthelial cells produce _____ to coat the cilia
- 8. opening that's larger than the nostrils and allows for the ventilation of a larger volume of air