key terms

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Across
  1. 1. scan A powerful Xray that provides a cross-section of the human body invented in 1972
  2. 6. The Romans built these to transport fresh water to highly populated areas
  3. 7. Medicines that treat infections by killing bacteria
  4. 8. An organism that can be seen only through a microscope. Examples include bacteria, protozoa, algae, and fungi
  5. 12. A heart monitor invented by Willem Einthoven in the early 1900’s
Down
  1. 2. substance that prevents the growth of microorgansms
  2. 3. Heating liquid or food to kill microorganisms
  3. 4. protected against,not affected by a disease
  4. 5. an unpleasant or unhealthy smell
  5. 9. A substance used to stimulate the production of antibodies and provide immunity against a disease
  6. 10. to give a weak version of a disease to a person or animal, usually by injection, for protection against that disease
  7. 11. of the four humours The belief that the substances that make up the human body are: black bile, yellow bile, blood, and phlegm