THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The pericardium is a dual-layered structure enveloping the heart and proximal great vessels. It consists of an inner visceral pericardium (also called the epicardium when in contact with the myocardium), and an outer parietal pericardium, composed of layers of collagen fibrils and elastin fibers.

Detailed explanation-2: -The inner part of the pericardium that closely envelops the heart is, as stated, the epicardium; it is also called the visceral pericardium.

Detailed explanation-3: -The epicardium is the outermost layer of the heart. It is actually the visceral layer of the serous pericardium, which adheres to the myocardium of the heart. Histologically, it is made of mesothelial cells, the same as the parietal pericardium.