Across
- 2. the blood vessels which go out from the heart
- 3. a special door in the heart which opens only one way
- 5. job
- 8. all living things
- 10. death of brain tissue
- 11. the basic part of all living things
- 12. Co2 is pushed out here
Down
- 1. the blood vessels which go into the heart
- 4. the bottom space of the heart
- 6. a group of same type cells that work together to do a special job
- 7. food
- 9. a small top space of the heart