First, Second and Third Lines of Defence

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Across
  1. 3. – A chemical that triggers inflammation and increases blood flow.
  2. 5. Blood Cells – General name for cells that attack and destroy pathogens.
  3. 9. – Proteins produced to neutralize specific pathogens.
  4. 11. – Raises body temperature to slow down or kill pathogens.
  5. 12. – Tiny hair-like structures that sweep away mucus and trapped microbes.
  6. 14. – The process of engulfing and digesting pathogens.
  7. 16. – Foreign substances that trigger an immune response.
Down
  1. 1. – Contains enzymes that help kill bacteria in the mouth.
  2. 2. Acid – Kills many ingested pathogens before they reach the intestines.
  3. 4. – A microorganism that causes disease.
  4. 6. – Fast-acting white blood cells that attack invaders.
  5. 7. – A response that increases blood flow to infected areas.
  6. 8. – Large white blood cells that engulf and digest pathogens.
  7. 10. - A sticky substance that traps pathogens in the respiratory system.
  8. 13. – A way to train the immune system using weakened or dead pathogens.
  9. 15. - The body's first physical barrier against pathogens.