MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The valves opening and closing
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The atria contracting
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The ventricles contracting
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The arteries pulsating
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Detailed explanation-1: -Heart sounds are created from blood flowing through the heart chambers as the cardiac valves open and close during the cardiac cycle . Vibrations of these structures from the blood flow create audible sounds-the more turbulent the blood flow, the more vibrations that get created.
Detailed explanation-2: -S2. The second heart sound, called S2, makes a “dub” sound caused by the closure of the semilunar (aortic and pulmonary) valves following ventricular systole. S2 is split because aortic valve closure occurs before pulmonary valve closure.
Detailed explanation-3: -When the two atrium chambers contract, the tricuspid and mitral valves open, which both allow blood to move to the ventricles. When the two ventricle chambers contract, they force the tricuspid and mitral valves to close as the pulmonary and aortic valves open.