Across
- 7. A substance used to stimulate the production of antibodies and provide immunity against a disease
- 9. A powerful X-ray that a provides a cross section of the human body invented in 1972
- 10. A heart monitor invented by Willem Einthoven in the early 1900s
- 12. Medicines that treat infections by killing bacteria
Down
- 1. The belief that the substances that make up the human body are: black bile, yellow bile, blood and phlegm
- 2. Heating liquid or food to kill microorganisms
- 3. 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. Examples include bacteria, protozoa, algae and fungi
- 5. A substance that stops or slows down the growth of microorganisms
- 6. Protected against, not affected by a disease
- 8. An unpleasant or unhealthy smell or vapour
- 11. The Romans built these to transport fresh water to highly populated areas