Across
- 2. Proteins made by B cells to fight pathogens
- 6. Foreign substances that triggers immunity
- 7. General response that acts quickly
- 8. Cells that remember past infections
- 10. Part of adaptive system
- 11. Disease-causing organism
Down
- 1. When blood vessels widen
- 3. System that carries immune cells through body
- 4. "Killer" T cells that destroy infected cells
- 5. Cells that of engulfing pathogens
- 6. Type of immunity in the 3rd line of defense
- 9. Part of innate system