Germs

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Across
  1. 6. _____ introduce microbes.
  2. 7. In order for the ____ to work it must know which cells are good and bad
  3. 9. ______ trigger an immune response in the body.
  4. 10. the immune system helps protect us against ________.
Down
  1. 1. our body's gain _____ in two ways active immunity and passive immunity.
  2. 2. what is it called when our bodies develop immunitie over time
  3. 3. The immune system is able to ______ through the entire body.
  4. 4. ____ introduce microbes that are already killed or modified.
  5. 5. The immune system is made up of _____.
  6. 8. what type of cells are found in the blood stream.