The thin-walled reservoirs of the heart are the:
A) atria.
B) pericardium.
C) sinuses.
D) ventricles.

Question

Quizplus · Accepted Answer

The atria are small, thin-walled structures that act primarily as reservoirs for the blood returning to the heart from the venous system. The pericardium is a double-walled, , fibroserous sac enclosing the heart and the bases of the great vessels. A sinus is a dilated channel for venous blood. The ventricles are large, thick-walled chambers that pump blood to the lungs and throughout the body. The ventricles are the primary muscle mass of the heart.

The Thin-Walled Reservoirs of the Heart Are The