👉 Periptery, also known as pericardial periphery, is a term used in anatomy to describe the outer layer of the heart's wall. Pericardial periphery refers to the area between the heart muscle and the wall of the heart cavity, which can be divided into three main regions: the muscular periphery, the cardiac periphery, and the interstitial periphery. The muscular periphery is the most visible part of the heart and is composed primarily of smooth muscle fibers