Cardiovascular System

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