1. Any disease of the heart and blood vessels.

2. Thickening of the walls of the blood vessels due to the deposition of fatty materials.

3. The stopping of the heart due to a blockage of coronary arteries.

4. The result of a blockage or haemorrhage of a blood vessel in the brain causing nervous tissue damage.

5. The arteries which supply the heart tissue with blood.

6. Pain in the heart during exercise resulting from narrowing of the blood vessels.

7. The useless fluttering rhythm that the heart goes into during a cardiac arrest.

8. The instrument used to measure blood pressure.

9. The height of the blood pressure peak caused by the contraction of the ventricles.

10. The lowest blood pressure which corresponds with the heart filling with blood.

11. The type of fat which can be deposited in the wall or arteries causing a thickening of the arteries.

12. The substance in cigarette smoke which increases blood pressure and increases carbon monoxide concentration in the blood.

13. A short statement, containing one idea, proposing an explanation for an observation.

14. The variable which is deliberately altered during an experiment.

15. The variables which are kept constant during an experiment.

16. The group used for comparison to an experiment group in an experiment.

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