Body System

3. a chemical made by the immune system that make it possible for white blood cells to destroy pathogens.
4. an organism that causes disease.
10. a chemical that kills fungi.
11. a organism a parasite lives in.
12. chemical substances that act as messengers in the body.
13. a nerve cell.
16. bacteria that cause disease.
17. all the chemical reactions occurring in the cell.
20. microscopic, single celled organisms.
21. the part of the neurone that contains the nucleus.
22. isolation to prevent the spread of a disease.
25. any factor that stimulates a receptor and brings about a response.
26. anything that causes our body to stop working properly.
28. the space between two neurones.
29. a substance that speeds up the rate of a reaction without being used up in the process.

1. a single cell with a though skin that fungi use to spread.
2. the organelle where proteins are manufactured.
5. a substance that kills bacteria or prevents the growth of bacteria.
6. able to maintain a constant body temperature.
7. a chemical that causes your body to react as if it had encountered a pathogen.
8. a viral disease, symptoms a rash of small, itchy blisters.
9. muscles or glands that put the messages into effect.
14. endocrine glands situated on the kidney.
15. part of the brain that is responsible for coordination and balance.
18. the cells on which a hormone acts.
19. a viral disease that causes a rash.
23. the nerves pathway operating in a reflex action.
24. a fungal infection, often known as ringworms.
27. an organic catalyst.