IMMUNE SYSTEM CROSSWORD

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Across
  1. 2. Foreign substance that triggers an immune response.
  2. 5. A microorganism that causes disease.
  3. 6. A tiny germ that needs a host cell to reproduce
  4. 7. Microorganism that causes disease.
  5. 10. Single-celled organisms; some are helpful, others cause illness.
  6. 12. Substance that stimulates immunity against a disease.
  7. 14. A disease spread by mosquitoes that affects red blood cells.
  8. 15. A rise in body temperature to help fight infection.
  9. 18. Type of white blood cell including B and T cells.
  10. 19. Body's ability to resist infection.
Down
  1. 1. Response causing redness, heat, and swelling.
  2. 3. A contagious viral infection that causes fever, cough, and fatigue.
  3. 4. Large white blood cell that engulfs pathogens.
  4. 8. Protein produced by B cells that binds to antigens.
  5. 9. A virus that attacks the immune system and weakens the body’s defences.
  6. 10. Lymphocyte that produces antibodies.
  7. 11. Lymphocyte that attacks infected cells directly.
  8. 13. When harmful germs enter the body and multiply.
  9. 16. A sign that shows you might be sick, like a fever or cough.
  10. 17. The body’s defence network against disease.