Across
- 3. surrounding the cytoplasm of a cell
- 6. air sacs
- 8. carries blood
- 10. the brain of a cell
- 11. where oxygen gose
- 12. around cell
Down
- 1. what we breath in
- 2. carry oxygen and carbon dioxide
- 4. breathing in and out
- 5. cell seperation
- 7. pumps blood
- 9. carries carbon dioxide