Pericardial Sac
The pericardium is the flexible, 2-layered sac that envelops the heart. The parietal pericardium is the outer layer of the pericardium, and the visceral pericardium is the inner layer.
The pericardium is the flexible, 2-layered sac that envelops the heart. The parietal pericardium is the outer layer of the pericardium, and the visceral pericardium is the inner layer.