Mrt 203

  1. The location of the heart
    • Lying oblique within anterior chest
    • In lower mediastinum
    • 2/3 of heart lies left of midline
  2. Base of heart
    • Broad upper portion
    • projects superiorly posteriorly and to right
    • formed by atria mostly left
  3. Apex of heart
    • lowermost part
    • projects inferiorly anteriorly and to left
    • posterior to left 5th intercostal space
    • Formed by tip of left ventricle
  4. Superior border of the heat
    • Formed by both atria and auricles
    • Greater vessels leave and enter heart
  5. Inferior border of heart
    • Formed by the right atruim and slightly by left ventricle
    • Rests mostly on the diaphragm
  6. Left border (pulmonary border)
    Formed by the left ventricle and little of left auricle
  7. Right border of heart
    Formed by right atruim
  8. Sternocostal surface
    Formed mainly by the right ventricle
  9. Diaphragmatic surface
    Formed by left and right ventricle ( mostly LV)
  10. What are the chambers of the heart
    • 2 Ventricle- inferior chamber
    • 2 Atria- superior chambers
  11. Right atrium recieves blood from
    SVC,IVC, and coronary sinus
  12. Pectinate muscle
    anterior wall has muscular ridges
  13. Fossa ovalis
    Prominent depression in the septum, the remnant of the foramen ovale
  14. Trabeculae Carneae
    Internally contains series of ridges formed from cardiac muscle bundles
  15. Blood coming from the right atrium passes through what value
    tricuspid value
  16. Left ventricle seperates by
    interventricular septum
  17. Pulmonary semilunar value
    opening between pulmonary trunk & RT. venticle
  18. Aoritic semilunar valve
    guards opening between LT ventricle & arota
  19. Sulci
    groves containing coronary blood vessels
  20. Coronary Sulci
    • Incircle most of heart
    • Marks boundary between atria & ventricle
  21. Anterior interventricle sulcus
    • Shallow groove on anterior surface
    • Marks boundary between right and left ventricle
  22. Posterior interventricle sulcus
    • Posterior surface groove continuous with ant
    • interventriclular sulcus
    • Boundary between right and left ventricles
  23. pericardium
    Membrane that surrounds and protects the heart
  24. Fibrous Pericardium
    • Outer superficial layer
    • Composed of tough fibrous connective tissue
  25. Function of the Fibrous Pericardium
    • Prevents over extension
    • Provides protection
    • Anchors heart to mediastinum
  26. Serous Pericardium
    • deeper thin layer forms a double layer around heart
    • consits of two layers
    • Parietal layer
    • Visceral layer
  27. Parietal layer
    • Outer serous layer
    • Thin delicate membrane fused to fibrous pericardium
  28. Viseral layer
    • inner layer also know as the epicardium
    • Covers outer part of heart and great vessels for 2-3 cm
    • one layer of heart
    • adheres to myocardium
  29. pericardial cavity
    • Potential space between layers
    • contians fluid (perital fluid)
    • Allows heart to move freely with out pericardial sac
    • Prevents friction
  30. Epicardium
    • Outer layer
    • Covers outer surface of myocardium
    • Functions to secret fluid into pericardial cavity
    • allows heart to contract freely
  31. The membrane which forms heart valves and lines the interior of the heart is called
  32. By far the thickest layer in the heart wall is the muscular one , the
  33. The outer most layer of the heart is the
  34. A partition the septum separates the two sides of the heart. The thin walled upper part of the spetum is the
    Interatrial septum
  35. Between the two right chambers of the hart lies the right AV valve. Also called the
    Tricuspid or TR atrioventricular valve
  36. The left AV valve is thicker and heavier than the right it is made of two flaps or cusps. It is called the
    Mitral/bucuspid / Atrioventricular valve
  37. Situated between the RV and the pulmonarty artery is the valve that prevents the blood on its way to the lungs from returnin gto the RV. This is the
    Pulmonary (semilunar) valve
  38. The valve that prevents blood from retruning to the left ventricle is the
    Aortic (semilunar) valve
  39. The contraction phase of the cardiac cycle is called
  40. The resting period that follows the contraction phase of the cardiac cycle is
  41. The pumping chambers of the hearat are the
  42. The coronary arteries supply blood to the
  43. The fibrous sac that surrounds the heart is the
    Pericardium or pericardial sac
  44. After supplying nutrients to the heart muscle blood is drained into the Ra by way of the
    Coronary Sinus
  45. Because each of the three parts of the two exit valves is half mooned shaped these valves are described as
    semilunar valves
  46. One complete sequence of relaxation and contraction of the heart is called
    Cardiac cycle lasts 0.8 seconds
  47. Which structure pervents inversion of AV vavles
    Chordae Tendinae
  48. The heart wall is formed by
    Epicardium and myocardium and endocardium
  49. During the cardiac cycle when the left atria contracts the right, right ventricle is in diastole
    True or false
  50. The papillary muscle are attached to the chordae tendinae
    True or false
  51. The popliteal vein receives blood from the great saphenous
    True or false
  52. The resting period that follows the contraction phase of the cardiac cycle is
  53. Blood gathers into 3 major veins
    • Superior vena cava
    • inferior vena cava
    • coronary sinus
  54. Blood exits the right ventricle by
    the pulmonary truck and carried to lungs
  55. blood returns to the heart by the
    Pulmonary veins to the left atrium
  56. Desending aorta and aortic arch divides into
    • Brachinocephalic artery
    • Left common carotid
    • left subclavian
  57. Connections between arteries or veins supplying the same region is
  58. Nervous controls center of the cardiovasculara system is located in the
    Medulla oblongata
  59. Rapidly conduct potential from apex upward to remain ventricular myocardium is
    Purkinje fibers
  60. Diastole 04sec
    • Relaxation of both atruium and ventricles
    • Atrium fills with blood after ventricles relax
  61. Systole 0.3 sec
    • Contraction of right and left ventricles
    • Aria relax and hear LUB after valve closes
    • Ventricle pressure increases opening semilunar valves
Card Set
Mrt 203