Across
- 4. blood that is oxygen-poor
- 6. valve between right atrium and right ventricle
- 9. small artery
- 12. wall diving a cavity
- 13. double layered membrane surrounding heart
- 15. lower tip of the heart
- 16. contraction phase of a heartbeat
Down
- 1. largest type of blood vessel
- 2. beat of the heart as felt through the arteries
- 3. lower chamber of the heart (2)
- 5. inner layer of the heart
- 7. small vein
- 8. abnormal swishing sound caused by a leaking valve
- 10. structure that temporarily closes directing blood flow
- 11. relaxation phase of a heartbeat
- 14. the largest artery in the body