medicine

4. Protected against, not affected by a disease
5. the belief that the substances that make up the human body are: black bile, yellow bile, blood and phlegm
8. A heart monitor invented by Willem Einthoven in the early 1900’s
10. a substance used to stimulate the production of antibodies and provide immunity against a disease
12. A substance that stops or slows down the growth of microorganisms

1. the romans built these to transport fresh water to highly populated areas
2. heating liquid or food to kill microorganism's
3. medicines that treat infections by killing bacteria
6. a powerful Xray that provides a cross-section of the human body invented in 1972
7. an organism that can only be seen through a microscope. examples include bacteria, protozoa, algae and fungi
9. an unpleasant smell or vapour
11. to give a weak form of a disease to a person or animal, usually by injection as a protection against diseases