Blood and the heart

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Across
  1. 4. sudden loss of heart function
  2. 6. blood that carries oxygen is...
  3. 8. small device that helps normalize someone`s slow heart rate
  4. 11. large vein that lets blood flow into the right atrium
  5. 12. contraction or pumping
  6. 16. volume of blood pumped into the systemic circulation per minute
  7. 17. exchange gas between tissues and cells
  8. 19. the main chambers of the heart
  9. 20. unsynchronized contractions of atria or ventricles
Down
  1. 1. middle muscular layer of the heart wall
  2. 2. slowing down of the heart frequency
  3. 3. receive blood and push it into the ventricles
  4. 5. process of transferring oxygnated blood to the myocardium
  5. 7. process of carrying deoxygenated blood to the lungs and oxygenated blood back to the heart
  6. 9. carry deoxygnated blood to the heart
  7. 10. largest artery of the heart
  8. 13. process of carrying oxygenated blood to the capillaries and then deoxygenated blood back to the heart
  9. 14. opposite of systole
  10. 15. separates right atrium from right ventricle
  11. 18. makes the blood appear red