Heart Questions

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Author:
SBraden
ID:
126596
Filename:
Heart Questions
Updated:
2012-01-08 15:41:43
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Heart
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Description:
Heart
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  1. The heart is enclosed within an area of the thorax known as the
    mediastinum
  2. The double sac membrane that covers the heart is the
    pericardium
  3. The heart has 3 layers of tissues; the middle and thickest layer is called the
    myocardium
  4. The layer of the heart tissue lining the heart chambers and making up much of the valvle tissue is the
    endocardium
  5. The heart chambers are seperated longitudinally by a body of tissue known as
    cardiac septum
  6. The blood recieving chambers of the heart are the
    atria
  7. The pumping chambers of the heart are the
    ventricles
  8. Blood returns to the heart from the lungs by means of the
    pulmonary veins
  9. The large artery carrying blood from the left ventricle of the heart is the
    aorta
  10. Those blood vessels that carry blood away from the heart are
    arteries
  11. Those blood vessels that carry blood towards the heart are
    veins
  12. On the right side of the heart, the valve between the right atrium and right ventricle is the
    tricuspid valve
  13. On the left side of the heart, the bicuspid valve has two flaps and is also known as the
    mitral valve
  14. The valves leading to the pulmonary trunk and aorta are referred to as the
    semilunar valve
  15. Arteries that supply blood to the tissue of the heart are the
    coronary arteries
  16. A blockage found in the heart muscle formed by dead cells is an
    myocardial infarction
  17. B/c the sinoatrial node sets the pace for autorhymic cardiac muscle activity of the heart, it is commonly known as the
    pacemaker
  18. The specialized cardiac muscle fibers in the interventricular septum, which distualute nerve impulses to tissues of the ventricles are the
    purkinje fibers
  19. Irregular heart rhythms sometimes occur and are known as
    arrhythmias
  20. The autonomic activity of the heart can be modified by a branch of th nervous system known as the
    ANS
  21. Heart contraction is known as
    systole
  22. Relaxation periods of the heart when contractions are not occuring are called
    diastole
  23. The heart beats approximately ______ beats per minute.
    72
  24. Unusual heart sounds, such as those emitted by poorly functioning valves, are called
    murmurs
  25. The smallest vessels, which carry blood to the cells of the tissues are the
    capillaries
  26. When an arterys lumen is narrowed, the condition is called
    vasoconstriction
  27. Dilated veins with pooled blood cause a condition known as
    vericose veins
  28. The pressure of blood can be measured by an instrument known as an
    sphygmomanometer
  29. A typical blood pressure reading contains two numbers, the first being systolic, the second
    distolic
  30. A slow pulse reflects a slow heart rate and a conditon known as
    bradycardia
  31. Insufficient oxygen and nutrients delivered to the body cells may induce a condition known as
    shock

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