7 The Human Body U2 L1 The Immune System

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Across
  1. 4. this is a substance that is prepared from killed or weakened pathogens
  2. 8. These cells activate B cells
  3. 9. ____ secreted by the skin can kill pathogens
  4. 13. this system is the skin and all of its structures
  5. 14. Hair such as ____ protects your eyes from particles entering your body
  6. 16. the ____ system consists of T and B cells
  7. 19. Microscopic ____ are all around you
  8. 20. these are cell pieces in the blood
  9. 22. this is a structure of skin ____ ____
  10. 23. these are specialized proteins that bind to a specific antigen
Down
  1. 1. this is your body's response to an infection. It slows down the growth of bacteria
  2. 2. this is a white blood cell that destroys pathogens
  3. 3. the immune system is made up of ____ ____ cells
  4. 5. white blood cells destroy invading ____
  5. 6. immunity is the ability to ____ infection
  6. 7. A pathogen causes ____
  7. 10. ____ cells are B cells and T cells that remember a specific pathogen
  8. 11. this occurs when blood flow increases to an injured area causing it to swell and turn red
  9. 12. both inflammation and fever are your body's internal
  10. 15. Your ____ provides external protection against pathogens
  11. 17. A pathogen can cause a ____
  12. 18. The body builds ____ against a disease then it is exposed to the pathogen that causes the disease
  13. 21. this is a substance that stimulates a response by the immune system