Across
- 4. connects, exchanges
- 6. disease causing agent
- 8. inner layer
- 10. to the heart
- 11. keeps skin moist
- 13. cools body
- 15. destroys virus
- 16. destroy pathogen
- 17. fight infection
- 18. spot pathogen
- 19. marking of a pathogen
Down
- 1. weak or dead strand of virus injected into blood
- 2. cause scabs
- 3. away from heart
- 5. redness, swelling and heat
- 7. outer layer
- 9. carries o2
- 12. skin,hair, nails
- 14. destroys bacteria