Why is our heart lub-dub ? give me answer
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Heart felt so boring, just for have some fun i t made a sound for its rhythmic contraction and relaxation called lub-dub.
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Answer:
The rythmic closure and opening of the valvae causes the sound of the heart
Explanation:
during ventricular systole the tricuspid and bicupid valve closes makes the longer duration sound lubb. during ventricular diastole closure of semilunar valve causes the shorter duration sound dupp
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