cardiovascular system

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Across
  1. 3. (Blood vessels that carry blood away from the heart)
  2. 6. (This process is caused by a buildup of plaque)
  3. 9. NODE (A specialized group of cells in the right atrium that acts as the heart's natural pacemaker)
  4. 12. (The valve between the right atrium and right ventricle)
  5. 15. (The tiny blood vessels where the exchange of oxygen and nutrients occurs)
  6. 20. (The two upper chambers of the heart)
  7. 21. (The process of the heart's electrical system sending signals to cause contraction)
  8. 23. FRACTION (A measure of the percentage of blood leaving the heart with each contraction)
  9. 24. (The main protein in red blood cells that transports oxygen)
  10. 25. (The thick, muscular wall of the heart)
Down
  1. 1. (The muscular wall that separates the left and right ventricles)
  2. 2. (The two lower chambers of the heart)
  3. 4. (The sac that surrounds and protects the heart)
  4. 5. (The valve that prevents blood from flowing backward into the left atrium)
  5. 7. (The phase of the cardiac cycle when the ventricles are relaxed)
  6. 8. (Blood vessels that carry blood back to the heart)
  7. 10. (The largest artery in the body)
  8. 11. (The term for high blood pressure)
  9. 13. (A type of circulation that carries blood from the heart to the lungs and back)
  10. 14. (The process of a blood clot forming to stop bleeding)
  11. 16. (The contraction phase of the cardiac cycle)
  12. 17. (The rhythmic expansion and recoil of arteries)
  13. 18. (This circulation loop supplies the heart muscle itself with blood)
  14. 19. OUTPUT (The amount of blood pumped by each ventricle per minute)
  15. 22. (The fluid component of blood)