Features of the Heart

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Across
  1. 2. Semilunar valves open and blood rushes out
  2. 5. ___ Arteries, branch off aorta to provide blood flow to the heart
  3. 8. Separates right atrium and ventricle
  4. 11. Separates left atrium and ventricle
  5. 12. ___ Tendineae, connects AV valves to papillary muscles
  6. 14. Type of valve that separates ventricles from vessels
  7. 16. Involved in cardiac muscle plateau phase
  8. 17. Semilunar valves close and heart refills
  9. 19. Receives oxygenated blood
  10. 20. Degree of stretch of heart muscle during filling
  11. 21. AV ___, only electrical connection between atria and ventricles
  12. 22. Vessels take blood from heart to lungs
  13. 24. Contractile strength at any given muscle length
  14. 25. Returns blood from systemic circulation to heart
  15. 26. Pressure ventricles must overcome to eject blood
  16. 27. Sac that surrounds heart
Down
  1. 1. ___ Nervous system, increases heart rate and increases force of contraction
  2. 3. Involved in cardiac muscle depolarization
  3. 4. Coronary ___, empties into the right atrium
  4. 6. Pumps blood to pulmonary circulation
  5. 7. Receives deoxygenated blood
  6. 9. Vessels take blood from lungs to heart
  7. 10. Feature on ECG showing ventricle repolarization
  8. 13. Pumps blood to systemic circulation
  9. 15. Spontaneously depolarizes, beginning of action potential
  10. 18. Feature on ECG showing ventricle depolarization (and atrial repolarization)
  11. 22. Involved in cardiac muscle repolarization
  12. 23. Feature on ECG showing SA node and atrial depolarization