History Keywords

2. Protected against, not affected by a disease
8. scanner a powerful Xray that provides a cross-section of the human body invented in 1972
9. Heating liquid or food to kill microorganisms
11. to give a weak form of a disease to a person or animal, usually by injection, as a protection against that disease
12. A heart monitor invented by Willem Einthoven in the early 1900’s

1. The belief that the substances that make up the human body are: black bile, yellow bile, blood, and phlegm.
3. An organism that can be seen only through a microscope. Examples include bacteria, protozoa, algae, and fungi.
4. a substance used to stimulate the production of antibodies and provide immunity against a disease
5. substance that stops or slows down the growth of microorganisms
6. an unpleasant or unhealthy smell or vapour.
7. Medicines that treat infections by killing bacteria.
10. The Romans built these to transport fresh water to highly populated areas.