The lubb and dubb heart sounds are produced d | vedclass

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(C) The heart sounds are produced by the closing of the heart valves.$1$. The first heart sound,'$lubb$',is produced by the closure of the atrioventri

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Closing of heart valves

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(C) The heart sounds are produced by the closing of the heart valves.$1$. The first heart sound,'$lubb$',is produced by the closure of the atrioventricular $(AV)$ valves (tricuspid and bicuspid valves) at the beginning of ventricular systole.$2$. The second heart sound,'$dubb$',is produced by the closure of the semilunar valves at the beginning of ventricular diastole.Therefore,both sounds are associated with the closing of valves.

The $lubb$ and $dubb$ heart sounds are produced due to:

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