Science, asked by sindu8067, 9 months ago

Why is our heart make lub dub sound

















Answers

Answered by GoodLuck8491
4

Answer:

“lub” sound is the first heart sound (S1) and is caused by the closing of the mitral valve and tricuspid valve. The “dub” sound is the second heart sound (S2) and is caused by the closing of the aortic valve and pulmonary valve.

Explanation:

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