The Immune System

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Across
  1. 4. A microscopic organism or agent that causes disease
  2. 5. A white blood cell that produces proteins to attack pathogens
  3. 10. A medical condition that cannot spread from person to person2
  4. 12. A simple, single-celled microbe without a nucleus
  5. 13. A protein that can identify and fight a specific pathogen
  6. 14. An increase in core body temperature over an extended time
  7. 15. A defence that blocks or traps pathogens before they can enter the body2
  8. 16. A component of blood that fights infections3
  9. 18. A medical condition that is caused by a pathogen2
  10. 19. A white blood cell that engulfs and destroys pathogens
  11. 21. A substance that boosts the body's immunity to a specific pathogen
  12. 22. Microscopic hairs on cells that line the airways
  13. 24. A medical condition that can spread from person to person by a pathogen
  14. 25. An organism with complex cells that feeds off a living host
  15. 26. A treatment that helps build immunity to an infectious disease
  16. 27. A painful redness or swelling of part of the body
  17. 28. The body system that prevents and fights disease2
  18. 30. Responses to specific pathogens inside the body that build immunity4
  19. 31. A B cell that remains in the bloodstream to recognize pathogens2
  20. 32. A microscopic infectious agent made of genetic material and proteins
Down
  1. 1. General responses to pathogens inside the body4
  2. 2. A change in a system causes another change in the opposite direction4
  3. 3. An organism that is too small to be seen with the naked eye
  4. 6. The percentage of a population that is vaccinated against a disease2
  5. 7. The body's ability to protect itself from infection
  6. 8. A sticky liquid that lines the nose, throat, lungs and intestines
  7. 9. A defence that kills pathogens before they can enter the body2
  8. 11. A medical condition that is not caused by a pathogen3
  9. 17. A medical condition with specific symptoms
  10. 18. An invasion of the body by pathogens that then multiply
  11. 20. Barriers that prevent pathogens from entering the body4
  12. 23. The percentage of unvaccinated people who become infected with a disease2
  13. 29. The protection from infection provided when most of a population is immune2