Across
- 2. a bacterial infection caused by clostridium tetani
- 3. a cell that viruses have invaded
- 6. part of the brain where the spinal cord enters the skull
- 7. chemical substances that act as messengers in the body
- 9. isolation to prevent spread of disease
- 10. part of the brain that is responsible for coordination and balance
- 13. nerve fibre that sends nerve impulses away from cell body
- 16. a disease that can spread
- 18. portion of the brain that regularly checks the internal environment of the body
- 19. all the chemical reactions occurring in the cells
- 20. an early antibiotic
- 21. anything that causes our body to stop working properly
- 25. a substance that kills bacteria or prevents the growth
- 26. all the endocrine glands of the body
- 28. part of the neurone that contains the nucleus
Down
- 1. an organism that causes disease
- 4. part of nervous system that slows the body down and controls it when resting
- 5. a pathogen about one hundred times smaller than bacterium
- 8. a viral disease that causes a rash
- 11. the electrical message carried by a nerve cell
- 12. microscopic single celled organisims
- 14. the system in your body that fights infections
- 15. any factor that stimulates a receptor and brings about a response
- 17. the common name for hormone epinephrine
- 19. the lower half of the brain
- 22. a single cell with a tough skin that fungi use to spread
- 23. the organism a parasite lives in
- 24. the cells on which a hormone acts
- 27. the nerve that carries messages to the brain from the retina at the back of the eye