Anatomy of the Pericardium: Layers and Structure of the Heart Sac #48785 (License: Personal Use)

This anatomical illustration depicts the heart encased in its protective pericardial sac, highlighting the outer fibrous pericardium, the inner parietal layer of the serous pericardium, and the visceral pericardium (epicardium) adhering directly to the heart surface. The potential space between the parietal and visceral layers-the pericardial cavity-contains a thin film of serous fluid that reduces friction during cardiac contractions.

Used in medical education, physiology textbooks, or online health resources to explain cardiac anatomy; matches user intent for understanding heart protection mechanisms and pericardial disease foundations.