CBSE Class 10 Answered
where are s1 and s2 heard?
Asked by akshay.beloshe | 12 Feb, 2018, 12:00: PM
Expert Answer
The "lub" is the first heart sound, commonly termedS1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second heart sound, "dub" or S2, is caused by the closure of the aortic and pulmonic valves, marking the end of systole.
Answered by | 12 Feb, 2018, 12:07: PM
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