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Class 11BiologyBody Fluids and CirculationsStructure and function of heart
Medium

What is the first heart sound?

  • A
    The 'lub' sound at the end of systole
  • B
    The 'lub' sound at the beginning of ventricular systole
  • C
    The 'dup' sound at the end of systole
  • D
    The 'dup' sound at the beginning of ventricular systole
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Class 11 Questions

Class 11

Biology Questions

Chapter

Body Fluids and Circulations

Subtopic

Structure and function of heart

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