Question

The first heart sound is​

Answer 1

Answer and Explanation:

S1

The first heart sound (S1) represents closure of the atrioventricular (mitral and tricuspid) valves as the ventricular pressures exceed atrial pressures at the beginning of systole (point a). S1 is normally a single sound because mitral and tricuspid valve closure occurs almost simultaneously.

Answer 2

Answer -

First heart sound is lubb sound at the beginning of ventricular systole.

_______________

ﾟ･*☆¸¸.•*¨*•♪¸¸.•*¨*•.•*¨*•.¸¸☆*･ﾟ

➻❥Iռɕɾεɖıɓɭε Kɦυꜱɦı࿐ཽ༵