Question

which sound appears when ventricles start contracting. what is its cause​

Answer 1

Explanation:

Normally, two distinct sounds are heard through the stethoscope: a low, slightly prolonged “lub” (first sound) occurring at the beginning of ventricular contraction, or systole, and produced by closure of the mitral and tricuspid valves, and a sharper, higher-pitched “dup” (second sound),

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Answer 2

Normally, two distinct sounds are heard through the stethoscope: a low, slightly prolonged “lub” (first sound) occurring at the beginning of ventricular contraction, or systole, and produced by closure of the mitral and tricuspid valves, and a sharper, higher-pitched “dup” (second sound), caused.

expection

The period between the end of one heart beat to the end of the next heart beat is called a cardiac cycle. The cardiac cycle is formed of three phases

Atrial systole

Ventricular systole and

Joint diastole

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