Across
- 3. the heart and prevent back flow
- 5. the lower Chambers of the heart left and
- 9. cycle
- 10. the out layer of the heart
- 13. relating to the lungs
Down
- 1. the inner living of the heart
- 2. heart pumps blood around the body
- 4. cava
- 6. sides of the heart
- 7. the wall of muscle seperating the left and
- 8. structures of blood that control blood flow
- 9. cycle the sequence of events that make up
- 11. the main artery carring blood away from the
- 12. heart beat