immunity stuff

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Across
  1. 5. the immune system helps to protect us against ____ caused by tiny invaders
  2. 6. when ____ are detected , messages are sent out, warning that the body is being attacked
  3. 7. scientists call the ___ that can cause diseases, antigens
  4. 8. some of these cells are specificaly designed for a certian disease
  5. 9. ____ remembers antigens that have already attacked the body
  6. 10. these cells are found in the blood stream and are called _____
Down
  1. 1. these cells produce antibodies that bind to antigens and neutralize them
  2. 2. when we were born our bodies may already have some immunity
  3. 3. these cells help to get rid of good cells that have already been infected
  4. 4. ___ destroy cells that have been infected by the invader