Pericardial cavity

Definition

The pericardial cavity is the thin, fluid-filled space between the parietal and visceral layers of the pericardium surrounding the heart. This cavity contains a small amount of lubricating fluid that reduces friction as the heart beats.

Related terms

Pericardium:

A double-layered membrane that encloses the heart, providing protection and support.

Visceral pericardium (Epicardium): The inner layer of the pericardium which closely covers the surface of the heart.

Parietal pericardium: The outer layer of the pericardium that forms a sac around the heart and roots of its great vessels