Which one of the following is a matching pair | vedclass

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(A) The first heart sound, $Lubb$, is produced primarily due to the closure of the atrioventricular $(AV)$ valves (bicuspid and tricuspid valves) at t

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Lubb - Sharp closure of $AV$ valves at the beginning of ventricular systole.

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(A) The first heart sound, $Lubb$, is produced primarily due to the closure of the atrioventricular $(AV)$ valves (bicuspid and tricuspid valves) at the beginning of ventricular systole.$Dup$ is the second heart sound, caused by the closure of the semilunar valves at the beginning of ventricular diastole.$Purkinje$ fibres are responsible for the conduction of the cardiac impulse throughout the ventricles, not for the initiation of the heartbeat (which is the function of the $SA$ node).

Which one of the following is a matching pair?

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