The Heart Part 1

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Across
  1. 4. valve separating left atrium and ventricle
  2. 5. made of cardiac muscle fibers, this is the contractile layer of the heart
  3. 8. valve separating chambers on the right side of the heart
  4. 9. the circuit that brings and removes blood from peripheral or body tissues
  5. 11. inferior, distributing chambers
  6. 13. part of cardiac conduction system in superior interventricular septum
  7. 15. cation responsible for the plateau
  8. 18. combination of desmosomes and gap junctions that bind together adjacent cardiac muscle fibers
  9. 20. simple squamous inner lining of heart-chambers
  10. 21. valves separating ventricles from arteries
  11. 25. valve separating the right ventricle from the pulmonary artery
  12. 26. connection between aorta and pulmonary trunk in fetuses
  13. 27. remnant of the ductus arteriosum
  14. 28. cells that spontaneously depolarize
  15. 30. flap-like extensions of the atria that are used to accommodate overflow
  16. 35. connective tissue connecting valve flaps to papillary muscles
Down
  1. 1. most superficial layer of the heart wall
  2. 2. muscles that secure AV valve flaps to the ventricular walls by connecting to chordae tendinae
  3. 3. also known as the SA node, this node is the pacemaker of the heart
  4. 6. valves separating atria and ventricles
  5. 7. skeleton connective tissue "skeleton" of the heart
  6. 10. part of cardiac conduction system in inferior inerventricular septum
  7. 12. the circuit that brings and removes blood from the lungs
  8. 13. also known as the AV node, this node relays the action potential between the atria and ventricles
  9. 14. blood vessels draining blood from the cells of the myocardium
  10. 16. double-layered membrane that surrounds the heart
  11. 17. remnant of the foramen ovale
  12. 19. tight intercellular junctions in intercalated discs
  13. 22. extensions of the fibrous skeleton that prevent backflow of blood
  14. 23. small nervous tissue fibers that innervate the myocardium of the ventricles
  15. 24. special action potential feature that shows the entended refractory period of cardiac muscle fibers
  16. 28. superior distributing chambers
  17. 29. blood vessels bringing blood to the cells of the myocardium
  18. 31. muscles in the wall of the atria
  19. 32. structures in intercalated discs that allow adjacent myocardial cells to share cytoplasm
  20. 33. hole between atria in fetuses
  21. 34. valve separating the left ventricle from the aorta