The Heart & Vascular System

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Across
  1. 2. Abnormal heart rhythm.
  2. 4. The wall dividing the left and right sides of the heart.
  3. 5. Inner lining of the heart chambers.
  4. 7. A recording of the heart's electrical activity.
  5. 10. Large vein carrying deoxygenated blood into the heart.
  6. 12. The main artery that carries oxygen-rich blood from the left ventricle to the body.
  7. 13. Lower chambers of the heart that pump blood out.
  8. 14. Abnormally fast heart rate.
  9. 15. Valve Valve between the left atrium and left ventricle.
  10. 16. Upper chambers of the heart that receive blood.
Down
  1. 1. This node is the heart's natural pacemaker.
  2. 3. Protective sac surrounding the heart.
  3. 6. Abnormally slow heart rate.
  4. 8. Smallest blood vessels where gas exchange occurs.
  5. 9. Reduced blood flow to an organ, typically the heart.
  6. 10. These prevent backflow of blood within the venous system.
  7. 11. The _______ arteries supply oxygen-rich blood to the heart muscle.
  8. 15. Muscular middle layer of the heart wall.