what is the pericardium? know the layers. study blue
Pericardial disease, or pericarditis, is inflammation of any of the layers of the pericardium. The pericardium is a thin tissue sac that surrounds the heart and consists of: Visceral pericardium -- an inner layer that envelopes the entire heart; A middle fluid layer to prevent friction between the visceral pericardium and parietal pericardium