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Dub sound of heart is caused by...

Dub sound of heart is caused by

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Lub sound produced by heart is caused by

Lub sound produced by heart is caused by

Lub sound produced by heart is caused by

"Lub' sound of heart beat is louder than 'Dubb'heart sound. Why?

A : Dub is a long and sharp sound. R : It is caused by closing of atrio ventricular valves.

A : Dub is a long and sharp sound. R : It is caused by closing of atrio ventricular valves.