Cardio System I

  1. atrium
    upper right and left chambers of the heart
  2. endocardium
    membrane lining the cavities of the heart
  3. myocardium
    heart muscle
  4. pericardium
    protective sac enclosing the heart composed of two layers with fluid between
  5. ventricle
    lower right and left chambers of the heart
  6. aortic valve
    heart valve between the left ventricle and the aorta
  7. mitral or bicuspid valve
    heart valve between the left atrium and left ventricle
  8. pulmonary semilunar valve
    heart valve opening from the right ventricle to the pulmonary artery
  9. tricuspid valve
    valve between the right atrium and the right ventricle
  10. arteries
    vessels that carry blood fromt he heart to the arterioles
  11. aorta
    large artery that is the main trunk of the arterial system branching from the left ventricle
  12. arterioles
    small vessels that receive blood from the arteries
  13. capillaries
    tiny vessels that join arterioles and venules
  14. venules
    small vessels thta gather blood from the capillaires into the veins
  15. veins
    vessels that carry blood to the heart from the venules
  16. systemic circulation
    circulation of blood throughout the body through arteries, arterioles, capillaries, and veins to deliver oxygen and nutrients to body tissues.
  17. coronary circulation
    circulation of blood throught the coronary blood vessels to deliver oxygen and nutrients to the heart muscle tissue.
  18. pulmonary circulation
    circulation of blood from the pulmonary artery through the vessels in the lungs and back to the heart via the pulmonary vein, providing for the exchange of gases.
  19. diastole
    to expand; the period in the cardiac cycle when blood enters the relaxed ventricles form the atria.
  20. systole
    to contract; period in the cardiac cycle when the heart is in contraction and blood is ejected through the aorta and pulmonary artery.
  21. hypotension
    low BP
  22. hypertension (HTN)
    high BP
  23. normotension
    normal BP
  24. sinoatrial (SA) node
    the pacemaker; highly specialized neurological tissue, embedded in the wall of the right atrium, responsible for initiating electrical conduction of the heartbeat.
  25. atrioventricular (AV) node
    neurological tissue in the center of the heart that receives and amplifies the conduction of impulses from the SA node to the bundle of His
  26. bundle of His
    neurological fibers, extending from the AV node to the right and left bundle branches, that fire the impulse form the AV node to the Purkinje fibers
  27. Purkinje fibers
    fibers in the ventricles that transmit impulses to the right and left ventricles, causing them to contract.
  28. polarization
    resting; resting state of a myocardial cell
  29. depolarization
    change of a myocardial cell from a polarized (resting) state to a contraction
  30. repolarization
    recharging of the myocardial cell from a contracted state back to a resting state
  31. normal sinus rhythm (NSR)
    regular rhythm of the heart cycle stimulated by the SA node (average rate of 60 to 100 beats/min)
  32. arteriosclerosis
    thickening, loss of elasticity, and calcification (hardening) of the arterial walls
  33. atherosclerosis
    buildup of fatty substances within the walls of arteries.
  34. thrombus
    a stationary blood clot
  35. embolus
    a clot carried in the bloodstream that obstructs when it lodges
  36. stenosis
    condition of narrowing of a part
  37. constriction
    compression of a part
  38. occlusion
    plugging; obstruction or a closing off.
  39. ischemia
    to hold back blood; decreased blood flow to tissue caused by constriction or occlusion of a blood vessel
  40. infarct
    to stuff; a localized area of necrosis caused by ischemia as a result of occlusion of a blood vessel
  41. angina pectoris
    chest pain caused by a temporary loss of oxygenated blood to heart msucle often caused by narrowing of the coronary arteries
  42. aneurysm
    a widening; bulging of the wall of the heart, the aorta, or an artery caused by congenital defect or acquired weakness.
  43. claudication
    to limp; pain in a limb while walking that subsides after rest; it is caused by inadequate blood supply
  44. diaphoresis
    profuse sweating
  45. palpitation
    subjectie experience of pounding, skipping, or racing heartbeats
  46. vegetation
    to grow, an abnormal growth of tissue around a valve, generally a result of an infection such as bacterial endocarditis.
Card Set
Cardio System I
Cardio System I