Across
- 3. washes microbes from surface of teeth
- 6. Lack of immunity
- 9. glands that produce sebum
Down
- 1. second line of defense
- 2. propel dust/microbes in mucous membrane
- 4. breaks cell walls
- 5. acidic ph, inhibits microbes
- 6. sheds to remove microbes from surface
- 7. prevents things entering ear
- 8. immunity defense present at birth