Across
- 3. lining within the heart
- 4. type of vein that carries blood from lungs to the heart
- 7. thickest layer of the heart wall
- 8. pertaining to the upper chamber of the heart
- 11. lower chamber of the heart
- 12. superior and inferior veins that bring blood back to the heart
- 14. membrane surrounding the heart
Down
- 1. heart beat
- 2. smallest blood vessel
- 5. largest vessel in the body
- 6. part of the heartbeat during relaxation
- 9. surgical repair of blood vessel
- 10. valve between left atrium and left ventricle
- 11. responsible for direction of blood flow
- 13. lowest point of the heart