Across
- 2. a structure that surrounds the cell; controls the movement of materials into and out of the cell.
- 4. the study of how and why diseases occur.
- 7. body system that fights disease.
- 8. able to be communicated to others.
- 11. cannot be passed on to others.
- 12. the most common form of one-called organisms
- 13. a theory about the relationship between cells and living things.
- 14. substances that help destroy harmful microbes.
Down
- 1. the structural and functional unit of all living organisms.
- 3. a scientist who studies diseases and how they spread
- 5. protects and supports the plant cell.
- 6. a condition of being able to resist an infectious disease.
- 9. a growth of germs in your body.
- 10. a type of medicine that kills microbes or prevents them from growing.
- 15. a rigidly spreading outbreak of an infectious disease.