Which serous pericardial layer lines the inner surface of the fibrous pericardium?

• A. Parietal pericardium
• B. Visceral pericardium
• C. Fibrous pericardium
• D. Epicardium

Answer: (A)

Serous pericardium consists of two layers that create a potential space between them. The parietal layer lines the inner surface of the fibrous pericardium, forming the outer boundary of the pericardial cavity. The visceral layer (epicardium) adheres to the heart itself. Between these two layers lies a small amount of lubricating fluid. So the layer that lines the inner surface of the fibrous pericardium is the parietal pericardium.