test 4 ch22

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issacgoboom
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test 4 ch22
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2013-07-16 19:10:01
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  1. Vascular system functions
    • move blood
    • control direction of blood flow
    • exchange chemicals
  2. Arteries move
    blood away from heart
  3. veins
    move blood toward heart
  4. capillaries
    exchange
  5. blood vessel path
    artery - arteriole - capillaries - venule - vein
  6. Tunic
    blood vessel walls
  7. Blood vessel wall layers
    • tunica interna
    • tunica media
    • tunica externa
  8. Tunica interna
    • innermost blood vessel wall layer
    • simple squamous epithelium
    • smooth thin
  9. endothelium
    simple squamous epithelium of blood vessel
  10. Tunica media
    • smooth muscle
    • middle layer of vessel wall
    • controls direction of blood flow
    • vasoconstriction/vasodilation
  11. elastic c.t.
    • in tunica media
    • maintains BP; move blood
  12. Tunica externa
    • outermost layer of blood vessel walls
    • fibrous c.t.
    • prevents rupture
  13. Artery wall layers
    • all three
    • tunica interna
    • tunica media
    • tunica externa
  14. elastic arteries
    • conducting vessels
    • have mostly elastic c.t. in tunica media
    • moves blood quickly
    • includes aorta and major branches
  15. Muscular arteries
    • distributing vessels
    • controls direction of blood flow to organs
    • tunica media - mostly smooth muscle
    • includes most named arteries
  16. veins
    • capacitance vessels
    • stores 65% of blood
  17. Vein walls
    • all 3 layers (tunica interna, tunica media, tunica externa)
    • Large lumen
    • thin walls
  18. Vein valves
    • prevent backflow
    • skeletal muscle pump
  19. Arterioles walls
    • only 2 layers (tunica interna + tunica media)
    • mostly smooth muscle
    • controls blood flow into capillaries
  20. Venules walls
    • only 2 layers (tunica interna + tunica media)
    • collects blood from capillaries
  21. Capillaries
    • only 1 layer: tunica interna (endothelium)
    • simple squamous epithelium
    • area of exchange between blood and tissues
  22. Capillary beds
    network of true capillaries
  23. Metarteriole
    feed into true capillaries
  24. throughfare channel
    collect from true capillaries
  25. precapillary sphincters
    • smooth muscle at root of each capillary
    • regulate flow into each true capillary
  26. Types of capillaries
    • contionuous capillary
    • fenestrated capillary
    • sinusoids
  27. Continuous capillary
    capillary with no pores
  28. clefts
    spaces between cells of capillary
  29. fenestrated capillary
    has pores in cell walls of squamous cells
  30. fenestrations
    • pores in cell walls of squamous cells
    • allows greater exchange
    • eg. small intestine, kidney
  31. Sinusoids
    • capillaries with very large pores in walls of simple squamous cells
    • eg. bone marrow, spleen, liver
  32. Artery anastomoses
    • connections between arteries
    • maintains blood supply in case of damage
    • most organs; joints
  33. Vein anastomoses
    • connections between veins
    • maintains blood drainage from area
  34. Systemic circulation
    • left bentricle > body > right atrium
    • heart > body > heart
  35. Pulmonary circulation
    • right ventricle > lungs > left atrium
    • heart > lungs > heart
  36. Detailed pulmonary circulation
    • right ventricle
    • pulmonary trunk
    • R & L pulmonary arteries
    • lungs
    • pulmonary capillaries
    • pulmonary veins
    • left atrium
  37. Aorta
    • part of systemic circulation
    • ascending aorta
    • aortic arch
    • thoracic aorta
    • abdominal aorta
  38. Ascending aorta
    coronary arteries
  39. Aortic arch
    • brachiocephalic a. (trunk)
    • left common carotid a.
    • left subclavian a.
  40. Brachiocephalic trunk
    • right common carotid a.
    • right suclavian a.
  41. Superior vena cava
    • systemic circulation, venous
    • collects blood from above diaphragm
  42. inferior vena cava
    collects blood from below diaphragm
  43. Inferior vena cava
    collects blood from below diaphragm
  44. Superior vena cava
    brachiocephalic v. (R & L)
  45. Brachiocephalic v.
    • internal jugular v. ( head)
    • subclavian v. (UE)
  46. Thoracic aorta
    • intercostal a.
    • esophegeal a.
    • pericardials
    • bronchial a. - oxygen to outer lung
    • superior phrenic
  47. intercostal veins
    • from thoracic area
    • drains into azygos system
  48. bronchial veins
    • veins from thoracic area
    • drains into azygos system
  49. esophageal veins
    • veins from thoracic area
    • drain into azygos system
  50. Lumbar veins
    • veins from thoracic area
    • drains into azygos system
  51. Azygos system drains into...
    SVC
  52. Azygos system
    Azygos v.

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