PATHOLOGY

Detailed explanation-1: -The part of the visceral layer that covers the heart, but not the great vessels is called the epicardium. As the serous pericardium reflects off various cardiac structures, it forms two sinuses: the transverse sinus and the oblique sinus.

Detailed explanation-2: -The pericardium, also called pericardial sac, is a double-walled sac containing the heart and the roots of the great vessels.

Detailed explanation-3: -The potential space between these two layers is called the pericardial cavity. This space normally contains 15 to 50 ml of serous fluid, 72 which serves as a lubricant to reduce friction and as a barrier against infection.