Across
- 3. chamber that receives O2 rich blood
- 4. node also known as the pacemaker
- 7. valve between the left atrium and ventricle
- 9. top 2 chambers of the heart
- 11. inner layer of the heart
- 13. chambers that pumps blood out to the arteries
- 14. middle, muscle layer of the heart
- 18. first artery to branch off aorta
- 19. septum between the ventricles
- 20. grove on heart, holds coronary blood vessels
- 21. always caries blood away from the heart
- 22. chamber that pumps O2 rich blood
Down
- 1. fluid component of blood
- 2. outer layer of the heart
- 5. chamber that pumps our O2 poor blood
- 6. largest artery in the body
- 8. allows blood to clot
- 10. valve between the right atrium and ventricle
- 12. bottom tip or point of the heart
- 15. chambers that receives O2 poor blood
- 16. protective membrane surrounding the heart
- 17. carry blood to the heart