The first heart sound is | BIOLOGY - CARDIAC CYCLE | SolveeIt | Solveeit

Today, August 19

Question

The first heart sound is

A

'Lubb' sound at the end of systole

B

'Dub' sound at the end of systole

C

'Lubb' sound at the beginning of systole

D

'Dub' sound at the beginning of systole

Answer

'Lubb' sound at the beginning of systole