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

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

During ventricular systole in human heart

During ventricular systole in human heart

Second heart sound-called dupp, is heard at the end of ventricular systole.

Semilunar valves open during ventricular diastole.

Assertion : In joint diastole, all the four chamber of heart are in relaxed state. Reason : The tricuspid and bicuspid valves are open and semilunar valves are closed at this stage.

Assertion : In joint diastole, all the four chamber of heart are in relaxed state. Reason : The tricuspid and bicuspid valves are open and semilunar valves are closed at this stage.

Semilunar valves open during the ventricular diastole.

Differentiate between the following pairs on the basis of what is given in brackets: Beginning of the ventricular systole and the end of ventricular systole. (type of heart sound)

Rise in ventricular pressure during ventricular systole leads to closure of atrioventricular valves which generates