Across
- 1. Single-celled pathogens that reproduce by splitting in half
- 3. Pathogens that absorb food from their surroundings
- 7. A pathogen that can cause diseases such as malaria and African sleeping sickness
- 8. An organism that is so small, it can only be seen with a microscope
- 10. Evidence that diseases are caused by microorganisms within the body
- 11. Multi-celled organisms that can be parasites inside of the human body
- 12. Activities that promote cleanliness and good health
Down
- 2. The body's natural defense against pathogens
- 4. Disease-causing viruses
- 5. A pathogen that is sub-microscopic; this means it can't even be seen with a light microscope
- 6. A chemical solution that contains a dead or weakened form of a pathogen
- 9. A chemical substance used to kill or slow the growth of baceria