Across
- 2. of infection entry
- 6. limited disease
- 8. cause no harm
- 13. free oxygen
- 14. live in organism
- 16. inflammation of tube
- 17. single-cell organism
- 19. venom of plant
- 20. sensitive to
- 21. absence of oxygen
Down
- 1. causes disease
- 3. bacteria
- 4. cause to decay
- 5. twisted bacterium
- 7. entire organ
- 9. genetic code
- 10. inflammation of bladder
- 11. parasites live on
- 12. affects intestines
- 15. live on dead
- 18. extremely small