Question

The beating sound your heart makes comes from:

A) Blood going in the wrong direction
B) Valves closing
C) The heart skipping beats
D) Your ears playing tricks on you

Answer 1

The answer is B. It is the only answer that make sense here.

Answer 2

B) Valves closing

Step-by-step explanation:

A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.