Immune System

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Across
  1. 4. the number of seconds you should wash your hands
  2. 5. thick, spongy jelly inside bones
  3. 8. organisms that are parasites on the body
  4. 9. the system that is home to germ-fighters
  5. 14. disease that usually attacks the liver
  6. 15. a virus spread by rodents
  7. 16. these cause infections
  8. 17. a disease that can get under toe nails
  9. 18. high blood sugar, an immune disease
Down
  1. 1. white blood cells
  2. 2. nodes that make up the lymphatic system
  3. 3. they help recognize and remember invaders
  4. 6. a type of arthritis
  5. 7. organ in your belly that helps fight germs
  6. 9. when immune system attacks healthy cells
  7. 10. to be free or resist illness
  8. 11. a disease that has no cure, you must endure it
  9. 12. chews up invading germs
  10. 13. a virus that can attack a human brain