history

5. An unpleasant or unhealthy smell or vapour.
6. An organism that can be seen only through a microscope. Examples include bacteria, protozoa, algae, and fungi.
8. To give a weak form of a disease to a person or animal, usually by injection, as a protection against that disease.
11. A heart monitor invented by Willem Einthoven in the early 1900’s

1. A substance that stops or slows down the growth of microorganisms.
2. The belief that the substances that make up the human body are: black bile, yellow bile, blood, and phlegm.
3. A powerful Xray that provides a cross-section of the human body invented in 1972
4. Protected against, not affected by a disease
7. Heating liquid or food to kill microorganisms.
9. medicines that treat infections by killing bacteria.
10. A substance used to stimulate the production of antibodies substance and provide immunity against a disease
12. The Romans built these to transport fresh water to highly populated areas