हिंदी

The 'Lub' and "Dub" heart sound are due to ______ -

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प्रश्न

The 'Lub' and "Dub" heart sound are due to ______.

विकल्प

  • Opening of heart valves

  • Action of papillary muscles 

  • Closing of heart valves 

  • Activity of pacemaker

MCQ
रिक्त स्थान भरें

उत्तर

The 'Lub' and "Dub" heart sound are due to closing of heart valves.

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