Across
- 2. several types of white blood cells belong to this group
- 4. a substance that kills or inhibits the growth of bacteria
- 7. a way of preventing disease
- 8. a type of white blood cell
- 9. a part of bacteria or viruses
Down
- 1. to cause disease these must enter a body and multiply
- 3. a chemical produced by lymphocytes
- 5. this means your immune system can kill pathogens
- 6. the organism that causes this are pathogens