History crossword

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Across
  1. 3. heart monitor invented by Eithoven
  2. 5. heating food to kill microorganisms
  3. 6. belief that the body is made up of four substances
  4. 8. not affected by disease
  5. 9. Provide immunity against disease
  6. 11. slows the growth of microorganisms
  7. 12. unpleasant smell or vapour
Down
  1. 1. weak dose to protect from disease
  2. 2. powerful xray
  3. 4. organism only visible in microscope
  4. 7. built by romans to transport fresh water
  5. 10. treat infections by killing bacteria