Across
- 3. flightless bird
- 7. the study on their function
- 8. shine with a soft tremulous
- 9. Very dry
- 11. animals have their digestive tracts
- 12. Living
- 13. To push or drive forward
Down
- 1. how the body maintains its internal temperature
- 2. how one conducts themselves
- 4. animal
- 5. Very great size
- 6. The only one around
- 8. held together in a particular way
- 10. food and drink are broken down into smaller parts