Across
- 4. Something used to save lives
- 6. How two different living organisms live together and depend on one another
- 7. A piece of writing written by their life
- 9. The removal of living tissue from the body for diagnostic examination
- 10. A piece of writing written about someone else
Down
- 1. This can help people live longer
- 2. The study of living things
- 3. Someone who studies living things
- 5. The study of the nervous system
- 8. The sphere where life is