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Explain heart sounds ....

Explain heart sounds .

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Each heart consists of two sounds.
1. First sound is Lub. It is loud pitched and lasts for about 0.16 second . It is produced due to the closure of bicuspid and tricuspid values during ventricular systole.
2. Second sound is called dub. it has a higher pitch and lasts for about 0.10 second. it is produced due to the closure of pulmonary and aortic semi luner values during ventricular diastole.
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