Across
- 5. biological substance to
- 9. immune cells that target antigens
- 11. type of white blood cell
- 13. immunity to foreign substances
- 14. protects the body from invaders
- 15. white blood cell kills microorganisms
- 17. nonspecific resistance
- 18. immunity given to the body
- 19. "Natural Killer cells"
Down
- 1. defends the body from infection
- 2. a blood protein
- 3. cells that reside in blood and tissues
- 4. immunity made by the body
- 6. develop from stem cells
- 7. responsible for the humoral immunity
- 8. immune system first line of defence
- 10. not affected by antibiotics
- 12. engulfs and absorbs bacteria
- 16. immunity