Thin-walled reservoirs of the heart are the

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 membranous 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 left heart and right heart are divided by a blood-tight partition called the cardiac septum.

Thin-Walled Reservoirs of the Heart Are the