BIOL140 Chapter 12 Crossword

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Across
  1. 2. the circuit of blood flow in the right side of the heart, contains blood low in oxygen, trasnports blood to and from the lungs
  2. 3. the inner lining of blood vessels consisting of simple squamous epithelium
  3. 5. the diameter of the lumen of an artery narrows, reducing blood flow
  4. 6. a pump that sets up a pressure gradient so blood will flow through vessels
  5. 10. the smaller and more thin-walled chamber of the heart
  6. 14. the body's main artery, the one that deals with the highest pressure
  7. 15. the hollow interior of blood vessels through which blood flows
  8. 17. capillaries merge to form these, the smallest kind of vein
  9. 18. heart muscle contraction
  10. 19. this separates the two halves of the heart
  11. 22. lymph flows through this type of vessel
  12. 23. occurs when the wall of an artery is weakened and swells outward, leading to bursted artery or blood clots
  13. 26. the system is composed of blood vessels and the heart
  14. 28. thick, muscular vessels that carry blood away from the heart to body tissues
  15. 29. the largest lymphoid organ, responsible for clearing blood of microorganisms and old RBCs and platelets
  16. 30. the thin lining of the cavities of the heart, reduces resistance to blood flow through the heart
  17. 32. the thick, fibrous sac that holds the heart
  18. 33. parasites block lymphatic vessels, preventing the return of fluid to blood, results in severe swelling
  19. 34. the larger and more muscular chamber of the heart
  20. 35. heart muscle relaxation
  21. 36. the circuit of blood flow in the left side of the heart, contains oxygen-rich blood, transports blood to and from body tissues
Down
  1. 1. the sinoatrial (SA) node is a natural one of these
  2. 4. the fluid of the lymphatic system identical to interstitial fluid
  3. 7. these valves separate the atria from the ventricles (tricuspid and bicuspid)
  4. 8. the irregular contraction of ventricles or atria
  5. 9. this gland plays a role in the maturation of certain lymphocytes
  6. 11. these vessels carry blood back to the heart and serve as reservoirs for blood volume
  7. 12. lymph ____ are bean-shaped structures which filter lymph as it flows through them
  8. 13. pressure wave created by the alternate expansion and contraction of arteries
  9. 16. this circulation nourishes the heart muscle, consists of arteries that branch off the aorta and veins that flow into the right atrium
  10. 19. valves these separate the ventricles from the exit vessels (aortic and pulmonary)
  11. 20. microscopic blood vessels connecting arterioles and venules, site of exchange of materials between blood and body cells
  12. 21. used to make a recording of the electrical events associated with the heartbeat
  13. 24. the wall of the heart, made of mostly cardiac muscle tissue
  14. 25. these prevent the backflow of blood in veins
  15. 27. the diameter of the lumen of an artery increases, increasing blood flow
  16. 31. the smallest arteries, the prime controllers of blood pressure