Heart Structure and Function Crossword

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Across
  1. 3. Divides the right and left sides of the heart
  2. 6. Spread electrical signals through ventricles
  3. 7. Upper chamber of the heart that receives blood
  4. 10. Prevents backflow of blood
  5. 12. Natural pacemaker of the heart
  6. 13. Conducts impulses to ventricles
  7. 14. Main artery carrying blood from the heart
  8. 16. Relaxation phase of the heart
  9. 18. Contraction phase of the heart
  10. 19. Carries blood to the heart
Down
  1. 1. Helps in clotting blood
  2. 2. Tightening of the heart muscles
  3. 4. Liquid part of blood
  4. 5. Fights infection
  5. 8. Smallest blood vessel
  6. 9. Carries oxygen
  7. 10. Lower chamber that pumps blood out of the heart
  8. 11. Loosening phase allowing blood to fill
  9. 15. Carries blood away from the heart
  10. 17. Delays impulse before it reaches ventricles