Across
- 4. Substance that kills bacteria
- 5. Injection used to provide immunity to microbes
- 6. Eating this could cause microbes to enter the body
- 8. White blood cells that remain in the blood after infection
- 9. marker Structure of surface of microbes
- 12. Hairs in the trachea that waft microbes
Down
- 1. The blood cell that forms part of the immune system
- 2. Microbes that cause infection
- 3. Substance produced by white blood cells
- 7. Covers the whole body and defends against microbes
- 10. To absorb and digest microbes
- 11. Vaccines contain a ........ or weakened microbe