Heart sounds are produced due to_________________________.
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The sounds produced are “lub-DUB”, lub being the first of the two. The lub is the sound produced by the closure of the tricuspid and mitral valves. The dub is the sound produced by the closure of the aortic and pulmonary valves.D
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In healthy adults, there are two normal heart sounds, often described as a lub and a dub that occur in sequence with each heartbeat. These are the first heart sound (S1) and second heart sound (S2), produced by the closing of the atrioventricular valves and semilunar valves, respectively
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