Germs & the Immune System

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Across
  1. 3. foreign substance in the body
  2. 4. immunity that develops throughout our lives
  3. 6. tiny, single-celled organisms that get nutrients from their environments and cause illness
  4. 8. some of these are parasites and need a living organism to live
  5. 11. the bodies defense against infection
  6. 12. help the body remember the invaders and destroy them
  7. 13. immunity that is borrowed from another source and lasts for short times
Down
  1. 1. plant-based organisms that cause things like athlete's foot and yeast infections
  2. 2. immunity that people are born with, like skin
  3. 5. destroy invading organisms like bacteria
  4. 7. these need to use another cell's structures to reproduce, they cause illness
  5. 9. vaccines work by making these which stay in our bodies and prevent future illness
  6. 10. help antibodies attack antigens