The Heart

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Across
  1. 4. heart rate less than 60 beats per minute
  2. 9. diagnostic test used to assess the electrical activity for diagnosing arrhythmias
  3. 10. hormone which causes increased heart rate and cardiac output
  4. 11. heart rate greater than 100 beats per minute
  5. 12. relaxation of heart muscle
  6. 13. largest heart chamber with thickest wall to pump blood out to entire body
Down
  1. 1. thickest layer of the heart / heart muscle
  2. 2. how cells in cardiac muscle are linked
  3. 3. heart's pacemaker where rate of 60-100 is set
  4. 5. keeps blood from flowing back into left ventricle
  5. 6. contraction of heart muscle
  6. 7. volume of blood pumped by each ventricle in a minute
  7. 8. valve located between right atrium and right ventricle