Immune System

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Across
  1. 2. Small white blood cell in the lymphatic system
  2. 4. Cells that activate the immune system
  3. 7. The process of exposing the body to an antigen to activate immune response
  4. 9. Swellings where lymph is filtered and lymphocytes are formed
  5. 11. Ability to resist against toxins
  6. 12. A toxin or foreign substance
  7. 13. An enzyme that destroys cell walls
  8. 14. Net work of smallest blood vessels
  9. 16. A substance that produces a fever
Down
  1. 1. a disorder that makes it easier to catch viruses and bacterial infections
  2. 3. a colorless fluid containing white blood cells
  3. 5. Cells that recognize viral antigens outside infected cells
  4. 6. When a person is given antibodies to a disease rather than producing it themselves
  5. 7. A blood protein substance that is recognized as foreign by the body in the blood
  6. 8. The bodys way of defending itself against foreign bodies
  7. 10. A cell that engulfs bacteria
  8. 15. A liquid that forms in infections