Across
- 4. An organism with complex cells that feed off a living host
- 7. A treatment that helps build immunity to an infection disease
- 10. A simple, single-celled microbe without a nucleus
- 11. A microscopic organism or agent that causes disease
- 12. A B cell that remains in the bloodstream to recognise pathogens
Down
- 1. A microscopic infectious agent made of genetic material and proteins
- 2. A white blood cell that engulf and destroys pathogens
- 3. A medical condition with specific symptoms
- 5. A protein that is produced by B cells to fight a specific pathogen
- 6. Microscopic hairs on cells that line the airways
- 8. An increase in core body temperature over an extended time
- 9. An invasion of the body by pathogens that then multiply
- 10. A white blood cell that produces antibodies to fight pathogens
- 12. A sticky liquid that lines the nose, throat, lungs and intestine