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Across
  1. 5. Collection of vessels supplying the right arm and head + neck
  2. 7. Coronary artery supplying majority of the cardiac conduction system
  3. 8. Valve between left atria and ventricle
  4. 10. Natural pacemaker of the heart
  5. 11. most commonly obstructed coronary artery (abbreviation)
  6. 12. Failure of this side of the heart results in pulmonary congestion
  7. 13. Becomes dilated in Tricuspid regurgitation
  8. 14. Structures connecting papillary muscles to
Down
  1. 1. delivers oxygenated blood into the left atrium
  2. 2. Structure responsible for venous drainage of the heart
  3. 3. Embryological shunt between the atria
  4. 4. Structure implicated in the degrees of heart block
  5. 6. First vessels to branch off the aorta
  6. 9. Type of blood vessel carrying blood from the right ventricle