Across
- 2. the arm of the neuron's body
- 4. parts of a cell
- 6. an area that contains a particular environment and eco system
- 7. one of the biggest killers in history
- 8. infected by drinking water containing a particular parasite
- 10. another word for tiredness
- 12. any agent that can cause disease
- 14. it controls everything we do
- 15. we get traits from our parents through our genes
- 17. changes in characteristics often over long periods of time
- 19. something new for the first time
- 20. found in the nervous system
Down
- 1. liquid formed in the mouth, part of the digestive system
- 3. a reduction in quality/ getting worse
- 5. many dinosaurs can be seen in this state
- 9. a word for the way a person acts
- 11. carbon dioxide is a large contributor to this
- 13. epidemics spread over a wide area
- 16. system it protects us from disease
- 18. most are small single celled creatures