Across
- 5. were blood is taken away from the body
- 6. blood cell they carry oxygen
- 7. something hard in your body
- 9. it prevents back blood flowing
- 11. it is a air way
- 12. It is in the membrane
- 14. blood cell Which prevent from infection
- 15. there are three layers
Down
- 1. which divide them into 4 section
- 2. it forms a clot to stop blood
- 3. were is splits into two ways
- 4. theory three parts
- 8. It is in the middle
- 10. were blood comes back to the heart
- 13. Were gas exchange happened