Across
- 3. system the system we need to breathe
- 8. A growing bacteria
- 10. a parasite that enters your body
- 11. is not infectious
- 12. lack of water
- 14. system a group of organs that work together
- 16. can spread from one person to another
- 17. system what we use to digest our food
- 18. a group of cells that work together
- 19. Smallest life to exist
Down
- 1. a term for a single-celled organism
- 2. too cold for the body
- 4. what we use to prevent a disease
- 5. system what we use to get rid of our waste
- 6. what we use to treat a diseasse
- 7. An infectious agent that can only replicate within a host organism
- 9. likely to be transmitted from person to person
- 13. an individual animal or plant
- 15. something that invades the body