Across
- 1. Bacteria: can contaminate food and water
- 4. Bacteria come in 3 shapes: rod, circular, and _________
- 7. System that protects the body from disease-causing pathogens
- 9. Needs a living host such as an animal to house and protect it (ex: viruses)
- 10. A type of blood cell that eats pathogens
- 12. Virus: invades the nervous system, can cause paralysis (forms of this have been used to treat brain cancer)
- 14. Cell with no nucleus
- 15. The occurrence of disease that is prevalent throughout the world
Down
- 2. Something used to destroy bacteria: comes from penicillin mold
- 3. Tiny organisms that invade the body and make it sick
- 5. A tiny, non-living particle that causes disease: it replicates only within the cells of living hosts
- 6. Virus: symptoms include a rash that can cause scarring, and blindness
- 8. A substance that stimulate the production of antibodies: helps the body recognize and defend against pathogens
- 11. A tiny, single-celled living organism that is found almost everywhere
- 13. Caused by bacteria: symptoms include a sore throat and high fever