Definitions

1. Heating liquid or food to kill microorganisms
3. A heart monitor invented by Willem Einthoven in the early 1900’s
5. An unpleasant or unhealthy smell or vapour.
7. A substance that stops or slows down the growth of microorganisms
9. To give a weak form of a disease to a person or animal, usually by injection, as a protection against that disease
10. Four 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.

2. the Romans built these to transport fresh water to highly populated areas.
4. Protected against, not affected by a disease
6. Medicines that treat infections by killing bacteria.
8. A substance used to stimulate the production of antibodies and provide immunity against a disease
11. scanner A powerful Xray that provides a cross-section of the human body invented in 1972