Final answer:
The pericardium consists of two sublayers, the fibrous pericardium and the serous pericardium. The serous pericardium has two layers, the parietal pericardium and the visceral pericardium (epicardium), which are fused together.
Step-by-step explanation:
The pericardium is the membrane that surrounds and protects the heart. It consists of two distinct sublayers: the fibrous pericardium and the inner serous pericardium. The fibrous pericardium is made of tough, dense connective tissue that provides protection and maintains the heart's position. The serous pericardium has two layers, the parietal pericardium and the visceral pericardium (epicardium), which are fused together.