Immune systems crossword

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Across
  1. 2. naturally existing immunity
  2. 4. immunity after being exposed to a small portion
  3. 6. type of immune cell
  4. 8. induces an immune response in the body
  5. 9. helps the body fight infection and other diseases
  6. 13. white blood cells engulf forgeign substances and body temperature rises
  7. 15. used to fight bacterial infections
  8. 16. recognize as aliens in the body
  9. 18. makes antibodies
  10. 19. disintegrates old red blood cells
  11. 20. an organism that causes disease
Down
  1. 1. type of white blood cell that surrounds and kills microorganisms
  2. 3. include T cells and B cells
  3. 5. fluid found in the lymphatic system
  4. 7. treated with antibiotics
  5. 10. causes an inflammatory response to an injury
  6. 11. filter lymph for bacteria and tumor cells
  7. 12. antibiotics are no longer effective
  8. 14. engulfs and absorbs bacteria
  9. 17. develops bone marrow