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