What is the function of the pericardium?

The pericardium is a double-layered membrane that encases the heart, providing both protection and structural support. Its primary role is to serve as a protective barrier, preventing infection and reducing friction during heartbeats as it allows movement. The outer fibrous layer is tough and anchors the heart in place, while the inner serous layer is smooth and secretes fluid to lubricate the heart and surrounding structures.

Understanding the specific functions of body membranes helps contextualize the anatomical interactions at play within the thoracic cavity. The pericardium’s role is crucial for maintaining heart health and function, emphasizing why it is correct to describe it as a membrane that surrounds the heart. This understanding of the pericardium can also aid in comprehending related pathophysiological conditions, such as pericarditis or cardiac tamponade, which involve this membrane.