The Heart Part 1

12345678910111213141516171819202122232425262728293031323334353637383940
Across
  1. 2. remnant of the foramen ovale
  2. 7. blood vessels draining blood from the cells of the myocardium
  3. 8. the pulmonary _______ brings oxygen-poor blood to the lungs
  4. 10. simple squamous inner lining of heart-chambers
  5. 12. the circuit that brings and removes blood from the lungs
  6. 15. superior distributing chambers
  7. 16. combination of desmosomes and gap junctions that bind together adjacent cardiac muscle fibers
  8. 18. remnant of the ductus arteriosum
  9. 21. most superficial layer of the heart wall
  10. 23. cells that spontaneously depolarize
  11. 27. special action potential feature that shows the entended refractory period of cardiac muscle fibers
  12. 28. extensions of the fibrous skeleton that prevent backflow of blood
  13. 29. valve separating chambers on the right side of the heart
  14. 31. structures in intercalated discs that allow adjacent myocardial cells to share cytoplasm
  15. 32. tight intercellular junctions in intercalated discs
  16. 34. blood vessels bringing blood to the cells of the myocardium
  17. 36. this large blood vessel brings blood away from the left ventricle to the systemic circuit
  18. 37. the pulmonary ______ brings oxygen-rich blood from the lungs to the left atrium
  19. 39. valves separating ventricles from arteries
  20. 40. valves separating atria and ventricles
Down
  1. 1. connection between aorta and pulmonary trunk in fetuses
  2. 3. also known as the SA node, this node is the pacemaker of the heart
  3. 4. also known as the AV node, this node relays the action potential between the atria and ventricles
  4. 5. muscles in the wall of the atria
  5. 6. hole between atria in fetuses
  6. 9. valve separating the right ventricle from the pulmonary artery
  7. 11. valve separating the left ventricle from the aorta
  8. 13. cation responsible for the plateau
  9. 14. skeleton connective tissue "skeleton" of the heart
  10. 17. the circuit that brings and removes blood from peripheral or body tissues
  11. 19. part of cardiac conduction system in the inferior interventricular septum
  12. 20. small nervous tissue fibers that innervate the myocardium of the ventricles
  13. 22. double-layered membrane that surrounds the heart
  14. 24. valve separating left atrium and ventricle
  15. 25. inferior, distributing chambers
  16. 26. flap-like extensions of the atria that are used to accommodate overflow
  17. 28. these large vessels drain blood from the systemic circuit to the right atrium
  18. 30. connective tissue connecting valve flaps to papillary muscles
  19. 33. made of cardiac muscle fibers, this is the contractile layer of the heart
  20. 35. part of cardiac conduction system in the superior interventricular septum
  21. 38. muscles that secure AV valve flaps to the ventricular walls by connecting to chordae tendinae