Class 11 Biology Body Fluids and Circulation Structure 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 Circulation

Subtopic

Structure and function of heart

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