The Immune System Crossword

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Across
  1. 2. reaction to antigens that are not dangerous to most people
  2. 8. retrovirus that infects helper t cells
  3. 11. body system that includes many external defenses
  4. 13. part of the immune system that enhances the ability of antibodies, attack cell membranes
  5. 14. substance that produces immunity in the body
  6. 16. condition caused by human immunodeficiency virus
  7. 17. WBC that acts as a first line of defense
  8. 19. raised body temp to stop disease
  9. 20. underdeveloped or weakened immune response
Down
  1. 1. makes antibodies that attach to specific antigens
  2. 3. made of cells that attack foreign substances
  3. 4. swelling & redness
  4. 5. uncontrolled cell growth
  5. 6. chicken wing sized organ, trains immune cells
  6. 7. white blood cell that engulfs & digests pathogens
  7. 9. the ability to resist or recover from disease
  8. 10. type of disease, body cells under attack
  9. 12. coordinates the immune response or attack infected cells
  10. 15. specialized protein that tags pathogens for destruction
  11. 18. an organism, a virus, or protein causing disease