First sound of heart beat is lower frequency and longer duration. It d...
Explanation:
The sound of the heartbeat is produced by the closure of heart valves. The heart valves are responsible for ensuring that blood flows only in one direction. The sound of the heart is divided into two sounds. The first sound is a low-frequency, long-duration sound, and the second sound is a high-frequency, short-duration sound.
The first sound of the heartbeat is heard when the bicuspid and tricuspid valves close. These valves are located between the atria and ventricles. The closure of these valves causes the first sound of the heartbeat.
The second sound of the heartbeat is heard when the semilunar valves close. These valves are located between the ventricles and the great arteries. The closure of these valves causes the second sound of the heartbeat.
Therefore, the correct answer is option B - the first sound of the heartbeat is produced by the closing of the bicuspid and tricuspid valves.
First sound of heart beat is lower frequency and longer duration. It d...
First heart sound is LUBB, produced at the beginning of ventricular systole due to closing of tricuspid and bicuspid valve and it is a dull sound for long period while second heart sound is DUPP produced at the beginning of ventricular diastole due to closing of semilunar valves and it is sharp sound for short period...