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Body Fluids And Circulations

Question
CBSEENBI11025950

Heart sound dub is caused due to closing of

  • valve

  • tricuspid valve

  • semilunar valve

  • None of the above

Solution

C.

semilunar valve

Dup (a second heart sound) occurred by closing the semilunar valve when high pressure developed in aorta and pulmonary artery tends to force some blood back towards the ventricle.