Across
- 3. an unpleasant or unhealthy smell or vapour
- 5. a substance that stops or slows down the growth of microorganisms
- 8. to give a weak form of a disease to a person or animal, usually by injection, as a protection against that disease
- 10. the romans built these to transport fresh water to highly populated areas
- 11. humours the belief that the substances that make up the human body are: black bile, yellow bile, blood and phlegm
- 12. an organism that can be seen only through a microscope. Examples include bacteria, protozoa, algae and fungi.
Down
- 1. protected against, not affected by a disease
- 2. a powerful X-ray that provides a cross-section of the human body invented in 1972
- 4. medicines that treat infections by killing bacteria
- 6. heating liquid or food to kill microorganisms
- 7. a substance used to stimulate the production of antibodies and provide immunity against a disease
- 9. a heart monitor invented by William Einthoven in the early 1900's