Heart Anatomy

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Author:
Shontae
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184111
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Heart Anatomy
Updated:
2012-11-17 15:09:04
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study guide exam 5
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  1. What is the BASE of the <3?
    the flat superior part
  2. What is the APEX of the <3?
    the inferior tip that points at an oblique angle
  3. What is the SUPERIOR BORDER of the <3?
    the base
  4. What is the RIGHT BORDER of the <3?
    right atrium
  5. What is the LEFT BORDER of the <3?
    left ventricle
  6. What is the INFERIOR BORDER of the <3?
    inferior wall of R atrium to the apex
  7. What is the ANTERIOR SURFACE of the <3?
    R atrium and R ventricle
  8. What is the POSTERIOR SURFACE of the <3?
    base, L atrium and L ventricle
  9. What is the DIAPHRAGMIC SURFACE of the <3?
    between the base and apex
  10. Where is the CORONARY SULCUS?
    between atria and ventricles
  11. What is the Interventricular SULCUS?
    divides the L and R ventricles
  12. What is the FUNCTION of the ATRIA?
    recieve blood that has to go to ventricles
  13. What is the FUNCTION of the VENTRICLES?
    propel blood around the circuits
  14. What is an AURICLE?
    lumpy wrinkled flap on atria that is expandable
  15. What are VALVES?
    folds of endocardium that extend between atria and ventricles
  16. What is the FUNCTION of the VALVES?
    open and close to prevent backflow and maintain a one-way flow of blood from atria to ventricles
  17. Describe BLOOD FLOW through the RIGHT ATRIUM.
    recieves oxygen poor blood from both venae cavae  (from systemic curcuit)
  18. What is the FORAMEN OVALE?
    hole in heart from 5 weeks to 48 hours after birth
  19. What is the FUNCTION of the FORAMEN OVALE?
    permits blood flow directly from R and L atria while the lungs are developing.
  20. What is the FOSSA OVALIS?
    the depression that forms when the foramen ovale closes
  21. What happens if the FORAMEN OVALE DOESN'T CLOSE?
    • blood recirculates into pulmonary circuit
    • reduces efficiency of circulation
    • increases BP
    • which means:
    •    <3 enlargement
    •     fluid buildup
    •     <3 failure
  22. Describe BLOOD FLOW on the RIGHT VENTRICLE?
    oxygen poor blood through tricuspid valve
  23. What are CHORDAE TENDINEAE?
    bundles of collagen fibers where where the cusps attach
  24. What are PAPILLARY MUSCLES?
    • cone shaped muscles on inner ventricular surface
    • where chordae tendineae arise from
  25. What is the FUNCTION of the CHORDAE TENDINEAE?
    • limit movement of cusps
    • prevent backflow from R ventricle to R atrium
  26. What are TRABECULAE CARNEAE?
    irregular muscular folds on internal surface of ventricle
  27. What are the CONUS ARTERIOSUS?
    superiot end of the R ventricle
  28. Describe the CUSPS of the PULMONARY VALVE.
    3 semilunar half moon shaped
  29. What is the PULMONARY TRUNK?
    the start of the pulmonary circuit
  30. What is the FUNCTION of the PULMONARY VALVE?
    prevent backflow of blood into right ventricle when chamber relaxes
  31. Why does the LEFT VENTRICL have such a thick wall?
    enabls it to develop enough pressure to force blood around entire systemic circuit 
  32. Why does the RIGHT VENTRICLE have a thinner wall?
    it only has to push blood to the lungs and back to the heart
  33. What is the function of the AORTIC SINUSES?
    prevent individual cusps from sticking to walls of aorta when valve opens 
  34. Where do the CORONARY ARTERIES deliver blood?
    to the myocardium
  35. What are the COMPONENTS of the ATRIOVENTRICULAR VALVES?
    • 1] ring of connective tissue that attaches fibrous skeleton of heart
    • 2] connective tissue cusps
    • 3] chordae tendineae
    • 4] papillary muscles 

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