Across
- 2. tiny organisms that can be helpful or harmful
- 5. clear liquid produced in the mouth
- 7. very small
- 9. living thing such as plant or animal
Down
- 1. used to prevent viruses from reproducing
- 3. medicine used to destroy harmful bacteria
- 4. organism from which a parasite gets nutrition
- 6. substance produced by the body to destroy germs
- 7. slimy substance that protects parts of the body
- 8. tiny organism that infects the body