THE STRUCTURE AND FUNCTION OF MAMMALIAN HEART

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Across
  1. 5. Blood vessels that carry blood away from the heart
  2. 6. Valve between the right atrium and ventricle
  3. 9. Fibrous cords that anchor heart valves
  4. 10. Fluid that reduces friction around the heart
  5. 11. The largest artery in the body; carries oxygenated blood from the left ventricle
  6. 13. Relaxation phase of the heartbeat
  7. 16. Delays electrical signal before sending it to the ventricles
  8. 17. Valve between left atrium and ventricle (also called mitral)
  9. 19. Type of circulation involving the lungs
  10. 20. Membrane that surrounds and protects the heart
  11. 21. Heart chamber that pumps blood to the whole body
  12. 23. Process by which the heart muscle contracts
  13. 24. Muscular wall separating the right and left sides of the heart
  14. 25. Carries electrical signals to make the ventricles contract
Down
  1. 1. Valve between left atrium and ventricle (also called bicuspid)
  2. 2. Muscle found only in the heart
  3. 3. Pacemaker of the heart
  4. 4. Vessels that return blood to the heart
  5. 7. Fluid tissue that transports substances throughout the body
  6. 8. Structure between heart cells that allows synchronized contraction
  7. 12. Carries oxygenated blood from the lungs to the heart
  8. 14. Upper chambers of the heart
  9. 15. Main pumping organ of the circulatory system
  10. 18. Circulation between the heart and body tissues
  11. 21. Heart chamber that receives blood from veins
  12. 22. Term describing heart contractions that originate within the heart muscle