GENERAL ANATOMY
ANATOMY OF THE HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The second heart sound (the dup of the lub-dup) is caused by the
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opening of the pulmonary and aortic valves
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closure of the tricuspid and bicuspid valves
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closure of the pulmonary and aortic valves
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opening of the tricuspid and bicuspid valves
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Explanation:
Detailed explanation-1: -The second heart sound, called S2, makes a “dub” sound caused by the closure of the semilunar (aortic and pulmonary) valves following ventricular systole.
Detailed explanation-2: -This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close. The next sound (the dub) happens when the aortic and pulmonary valves close after the blood has been squeezed out of the heart.
Detailed explanation-3: -The semilunar value-The second sound of the heart is high pitched ‘DUB’ It is caused by vibrations associated with the closure of aortic and pulmonary valves.
There is 1 question to complete.