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  • Animal Anatomy and Physiology
  • The LUB sound of heart is caused due to
Multiple choice

The LUB sound of heart is caused due to

  1. closing of AV valves

  2. closing of SLV

  3. opening of AVV

  4. opening of SLV

  5. atrial systole

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A Correct answer
Explanation

It occurs just after the atrial systole, and it is known as first heart sound. It is heard like LUB.

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