The immune system

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Across
  1. 2. Type of barrier in the 1st line which breaks down the pathogen
  2. 3. Attacks cells of the body which are infected by a pathogen. Not a B-lymphocyte but a...
  3. 4. Chemical barrier; inside the stomach
  4. 7. Chemical barrier which is found in the mouth
  5. 8. Type of cell which creates immunity in the body
  6. 10. Type of blood cell responsible for the immune response
  7. 11. Also called the epidermis - physical barrier which blocks pathogens
  8. 13. The first and second lines of defence treat pathogens in this way
  9. 15. The marker on the surface of a pathogen which the immune system recognises
Down
  1. 1. Type of white blood cell which attacks specific antigens in the 3rd line of defence
  2. 5. 2nd line of defence - heat, red, sore, swelling
  3. 6. 2nd line of defence - engulfs invading pathogens
  4. 9. Type of barrier in the 1st line which blocks the pathogen
  5. 12. Physical barrier which ejects pathogens from the respiratory system
  6. 14. A protein made by B-lymphocytes to attack specific antigens