Science, asked by aminrupwakraw1827, 7 months ago

why our heart make lub dub sound?

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Answered by Anonymous

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The sound of a heartbeat is caused by the heart valves opening and closing as they pump blood. When the heart is working properly, blood can only flow in one direction. ... The" lub" is the sound of the tricuspid and mitral valves closing. The" DUB" is the sound of the aortic and pulmonary valves closing.

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Answered by ashly2929

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Answer:

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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why our heart make lub dub sound?