First heart sound is `:-`

Read the following statements carefully and select correct choice from below: (a) First heart sound lub is produced due to closure of atrioventricular valves, (b) First heart sound is of longer duration than second heart sound dub.

Read the following statements carefully and select correct choice from below: br (a) First heart sound lub is produced due to closure of atrioventricular valves, br (b) First heart sound is of longer duration than second heart sound dub.

First heart sound occurs at

which one is the first heart sound ?

First heart sound results from a closure of semilunar valves.

Assertion : First heart sound (LUBB) is produced at the beginning of ventricular systole stage. Reason : During ventricular systole semilunar valves are closed.

Assertion : First heart sound (LUBB) is produced at the beginning fo ventricular systole stage. Reason : During ventricular systole semilunar valves are closed.

Which is the first Heart sound ?

Which is the first Heart sound ?

Which is the first Heart sound ?