Heart Crossword

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Across
  1. 4. Stimulates the contraction of both atria.
  2. 5. Is the total volume of blood ejected from the heart per minute
  3. 9. Is also affected by the endocrine and nervous
  4. 10. Between 60 and 80 ml of blood are ejected from the ventricles.
  5. 12. Another conducting cell group located between the atria and ventricle.
  6. 15. Make a sound when they close during the cardiac cycle.
Down
  1. 1. Spreads out over the atria, making them contract or depolarize.
  2. 2. Electrical impulse shoots along the ventricles
  3. 3. Generates in the heart muscle itself.
  4. 6. A heart removed from the body will continue to beat
  5. 7. Are closed to prevent the blood flowing back into the ventricles.
  6. 8. Contracts rhythmically to perform its duty as a forceful pump.
  7. 11. Increases cardiac output, because the heart rate is increased.
  8. 13. The valves that make a sound when they close.
  9. 14. The muscles receive only 27% of the cardiac output.