Across
- 2. help someone or something to improve or get better .
- 4. system a way that your body protects you from disease .
- 7. a disease that affects a particular part of your body and is caused by bacteria or a virus.
- 9. the smallest separate part of a plant or animal
- 10. to do something , especially something difficult or useful .
Down
- 1. a special way of doing something .
- 3. a part of your body that performs a job, e.ge the brain or heart .
- 5. to behave in a particular way or show a particular emotion because of something that has happened.
- 6. a very small living thing that causes disease .
- 8. very bad or very serious .
- 9. breathing air into the mouth of an unconscious person.