First, Second & Third Lines of Defence

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Across
  1. 3. – Protection against a specific disease.
  2. 4. – A fluid carrying immune cells.
  3. 7. – Caused by increased blood flow during infection.
  4. 12. – A tiny infectious agent that needs a host to survive.
  5. 13. – A substance that trains the immune system.
  6. 14. – Single-celled organisms that can cause disease.
  7. 15. – Process that seals wounds to keep germs out.
  8. 17. – A protein that fights specific pathogens.
  9. 19. – A type of white blood cell in the immune response.
  10. 21. – The body's outermost protective layer.
  11. 22. – Tiny hairs that move mucus out of the lungs.
  12. 24. – Chemical that triggers swelling and redness.
Down
  1. 1. – The liquid part of blood containing antibodies.
  2. 2. – Response that causes redness and pain in tissues.
  3. 5. – Type of cell that "remembers" past infections.
  4. 6. – Helps kill bacteria in the mouth.
  5. 8. – A fast-moving white blood cell.
  6. 9. – General term for a cell that eats germs.
  7. 10. – A white blood cell that engulfs invaders.
  8. 11. – A rise in body temperature to fight infection.
  9. 16. – A foreign molecule that triggers an immune response.
  10. 18. – General term for a first-line defense.
  11. 20. – Sticky substance that traps germs in airways.
  12. 23. – Found in the stomach; kills swallowed germs.