Question

what are heart sounds called?​

Answer 1

Explanation:

The “ lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.

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Answer 2

Answer:

When a stethoscope is placed on the chest over different regions of the heart, there are four basic heart sounds that can be heard (listening to heart sounds is called cardiac auscultation).

Explanation:

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