the immune system

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Across
  1. 3. when blank are detected they send messages to the body warning it,its being attacked
  2. 7. killer t cells destroy cells that have been infected by the invader
  3. 9. the blank system learns how fight off the diseases_
  4. 10. these cells produce antibodies that bind into antigens and_
Down
  1. 1. our bodies gain immunities in two ways active immunity and __immunity
  2. 2. your body responds much faster and stronger the second it sees an_
  3. 4. blank tell b cells to start making antibodies or instructed killer t cells to attack
  4. 5. the immune system helps to protect us against_
  5. 6. proteins that help to fight off the antigens are called blank
  6. 8. different people have different levels of blank to certain diseases