The heart sounds are due to the
A)valves closing.
B)heart contraction.
C)heart relaxing.
D)blood flowing.

Question

Quizplus · Accepted Answer

The heart sounds are primarily due to the closing of the heart valves, as blood flows through the heart and is directed towards the correct chambers based on the valve movements. The two distinct heart sounds (lub-dub) correspond to the closure of the mitral and tricuspid valves (lub) and the closure of the aortic and pulmonary valves (dub). While blood flow and heart contraction and relaxation are important processes within the heart, they do not directly cause the audible heart sounds.

The Heart Sounds Are Due to the