Question

What best describes how the heart beats? (Hint: do not think of the order of blood flow for this question; look at how the heart beats)

A. One chamber at a time – no chambers beat simultaneously
B. Left side of the heart beats simultaneously, followed by the right side of the heart beating simultaneously
C. The right atrium beats, followed by the right ventricle. The left atrium and left ventricle do not contract/beat.
D. Both atria beat simultaneously, followed by both ventricles beating simultaneously

Answer 1

The heart beats in a specific sequence: both atria beat simultaneously, followed by both ventricles beating simultaneously.

Step-by-step explanation:

The heart beats in a specific sequence to efficiently pump blood throughout the body. The correct answer is D. Both atria beat simultaneously, followed by both ventricles beating simultaneously. In this sequence, the electrical impulses in the heart cause the atria to contract at the same time, pushing blood into the ventricles. Then, the ventricles contract together, pumping blood out of the heart to the lungs or the rest of the body.