Test 4 Ch21 Heart

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Test 4 Ch21 Heart
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2013-07-15 18:28:39
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  1. Mediastinum
    area between the lungs where the heart is located
  2. Pericardial sac
    • fibrous pericardium
    • surrounds heart
  3. Parietal pericardium
    • serous membranes
    • lines pericardial sac
  4. Vesceral pericardium
    • Serous membrane
    • covers the heart
  5. Endocardium
    • Inner lining of the heart wall
    • Smooth: decreases friction
  6. Myocardium
    • cardiac muscle¬†
    • in heart wall
  7. Epicardium
    • covers myocardium
    • same as visceral pericardium
  8. Systemic circuit
    • body circulatory system
    • Heart-body-heart
  9. Systemic circuit order
    left ventricle - body - right atrium
  10. Pulmonary circuit
    • circulatory system of the lungs
    • heart - lungs - heart
  11. Pulmonary circuit order
    right ventricle - lungs - left atrium
  12. Right heart
    from body to lungs
  13. Left heart
    from lungs to body
  14. Atrium
    upper chamber
  15. Right atrium
    receives blood from body
  16. Left atrium
    receives blood from lungs
  17. Ventricle
    lower chamber
  18. Right ventricle
    pumps blood to lungs
  19. Left ventricle
    pumps blood to body
  20. arteries
    carry blood out of heart
  21. pulmonary trunk
    • blood from heart,
    • R ventricle to lung
  22. Aorta
    • blood from heart
    • from L ventricle to body
  23. Veins
    carry blood in to heart
  24. Superior vena cava
    • blood into heart
    • from upper body to R atrium
  25. Inferior vena cava
    • blood in to heart
    • from lower body to R atrium
  26. Pulmonary veins
    • blood into heart
    • from lungs to L atrium
  27. Heart valves
    prevent backflow
  28. Atrioventricular valves
    • prevent backflow from ventricle to atrium
    • Tricuspid/Bicuspid(Mitral)
  29. Tricuspid
    atrioventricular valve with 3 flaps
  30. Bicuspid
    • aka Mitral
    • atrioventricular valve with 2 flaps
  31. Semilunar valves
    • heart valve
    • prevent backflow from arteries to ventricles
    • Pulmonary/Aortic
  32. Pulmonary heart valves
    • Semilunar valves
    • prevent backflow from arteries to ventricles
  33. Aortic heart valves
    • semilunar valves
    • prevent backflow from arteries to ventricles
  34. Heart sounds
    closing of valves
  35. 1st heart sound
    A-V(atrioventricular) valves closes
  36. Ventricular systlole
    • 1st heart sound
    • forces blood against valves
    • A-V valves close
  37. 2nd Heart sound
    Semilunar valves close
  38. Ventricular diastole
    • 2nd heart sound
    • gravity from blood in arteries
    • Semilunar valves close
  39. Pectinate muscles
    atrium structure
  40. Fossa ovalis
    atrium structure
  41. Chordae tendineae
    Ventricle structure
  42. Papillary muscles
    ventricle structures
  43. Trabeculae carneae
    ventricle structure
  44. Interventricular septum
    internal
  45. interatrial septum
    internal
  46. Coronary sulcus
    external groove
  47. Anterior interventricular sulcus
    external groove
  48. posterior interventricular sulcus
    external groove
  49. Apex
    in the heart
  50. fibrous skeleton
    in the heart
  51. Coronary arteries
    branch from aorta
  52. Anterior interventricular artery
    • left coronary artery
    • branch from the aorta
  53. Circumflex artery
    • left coronary artery
    • branch from the aorta
  54. Marginal artery
    • right coronary artery
    • branch from the aorta
  55. Posterior interventricular artery
    • right coronary artery
    • branch from the aorta
  56. Cardiac veins
    • 4 veins
    • great cardiac vein
    • middle cardiac vein
    • small cardiac vein
    • posterior vein
  57. Great cardiac vein
    • cardiac vein
    • coronary circulation
  58. Middle cardiac vein
    • Cardiac vein
    • coronary circulation
  59. Small cardiac vein
    • cardiac vein
    • coronary circulation
  60. Posterior vein
    • cardiac vein
    • coronary circulation
  61. Coronary sinus
    • returns all blood to right atrium
    • coronary circulation
  62. Cardiac muscle tissue features
    • involuntary
    • striated sarcomeres
    • short cells
    • branched arrangement
    • intercalated discs
  63. intercalated discs
    • connections between cells
    • desmosomes/gap junctions
  64. Functional syncytium
    all cells contract simultaneously
  65. Autorhythmic cells
    • noncontractile cardiac cells
    • depolorize without nerve stimulation
  66. Conduction pathwaay
    • S-A node
    • internodal pathway
    • A-V node
    • A-V bundle (bundle of His)
    • bundle branches
    • Purkinje Fibers
  67. innervation
    supplying with nerves
  68. Cardioaccelerator center
    • S-ANS to S-A node and pathway
    • speeds up heartrate and heart pumps
  69. Cardioinhibitory center
    • P-ANS to S-A node and A-V node
    • slows down heart

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