Cardiology Crossword

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Across
  1. 2. Flaps of tissue that close a valve tightly
  2. 4. An alternative name for the mitral valve
  3. 5. The lower chambers of the heart
  4. 7. The blood vessels that deliver blood to heart muscle
  5. 9. The bottom number of a blood pressure reading
  6. 11. Another word for heart muscle
Down
  1. 1. The natural pacemaker of the heart
  2. 3. An irregularity in the hearts rhythm
  3. 6. The outermost layer enclosing the heart
  4. 8. The ICD-10 chapter number for Diseases of Circulatory System
  5. 10. Number of chambers in the heart
  6. 12. Blood pressure is measured in millimetres of what?