The Cardiovascular System

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Across
  1. 3. These arteries supply blood to the myocardium
  2. 4. This atrium receives deoxygenated blood from the venae cavae
  3. 5. The contraction phase of the heartbeat
  4. 7. The sac containing the heart
  5. 8. This membrane lines the 4 heart chambers
  6. 9. These medications relax smooth muscle in arterial walls
  7. 11. Vessels that carry blood away from the heart
  8. 12. This ventricle pumps blood to the aorta
Down
  1. 1. Incompetent valves can lead to these types of veins
  2. 2. These microscopic vessels allow nutrient and gas exchange
  3. 5. Also known as the pacemaker of the heart
  4. 6. This valve is between the right atrium and right ventricle
  5. 10. These medications lower cholesterol