Cardiovascular system

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Across
  1. 4. ECG wave representing atrial depolarization SAU10 CVS
  2. 6. Valve between left atrium and left ventricle SAU10 CVS
  3. 7. ECG wave representing ventricular repolarization SAU10 CVS
  4. 8. Ventricular contraction and blood ejection phase
  5. 9. Thickest heart wall layer; cardiac muscle that pumps blood SAU10 CVS
  6. 11. Double-layered sac enclosing the heart SAU10 CVS
  7. 14. More stretch from venous return → stronger contraction SAU10 CVS
  8. 16. Ventricular relaxation and filling phase
  9. 17. Resistance the heart overcomes during ejection; raised by hypertension SAU10 CVS
  10. 18. Heart's pacemaker in the right atrium
Down
  1. 1. 'Heart strings' preventing AV valve leaflets from flapping over
  2. 2. Delays impulse so atria finish before ventricles contract
  3. 3. Valve between right atrium and right ventricle SAU10 CVS
  4. 5. Blood pumped per ventricle per beat (ml/beat)
  5. 10. Spread impulse to ventricular wall causing twisting contraction
  6. 12. Heart rate multiplied by stroke volume
  7. 13. ECG wave representing ventricular depolarization and contraction SAU10 CVS
  8. 15. Ventricular stretch just before contraction; set by venous return