Cardiovascular System

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Across
  1. 1. upper chambers of the heart
  2. 6. direction of first contraction of the heart
  3. 8. electrical fibres on the bottom of the heart
  4. 9. passes electrical signal into ventricals
  5. 11. veins have these but other vessels don't
  6. 13. red blood cells
  7. 14. myocardial __________ is a heart attack
  8. 15. pressure observed in artery:heart fills with blood
  9. 16. pressure observed in artery: heart contracts
  10. 18. pumps blood to the rest of the arteries
  11. 19. O2, CO2 and nutrients are exchanged
  12. 22. cardiac muscle
  13. 24. regulate blood clotting
Down
  1. 2. the pump related to breathing
  2. 3. bind CO2 and O2
  3. 4. SA node aka
  4. 5. the sinus in the right atrium completing circulation of the heart
  5. 7. lines the inside of the heart
  6. 8. veins that return blood from the lungs to heart
  7. 10. slightly smaller vein size
  8. 11. delivers deoxygenated blood to heart
  9. 12. smaller than arteries
  10. 17. a pulmonary valve
  11. 20. white blood cells
  12. 21. shows ventricular depolatizationon an ECG
  13. 23. muscles do this to veins when they contract