The ventricles of the heart have thicker myocardium than the atria.

Question

Quizplus · Accepted Answer

The ventricles are responsible for pumping blood to the lungs and the rest of the body, and therefore require thicker myocardium (muscle tissue of the heart) to generate greater force and pressure during contraction. The atria, on the other hand, are responsible for receiving blood from the body and lungs, and do not require as much force to push blood into the ventricles, so they have thinner myocardium.

The Ventricles of the Heart Have Thicker Myocardium Than the Atria