Heart Wall Layers and Their Roles

The heart wall has three layers: the epicardium, myocardium, and endocardium. Each layer has a different structure and job. Together, they help the heart pump blood through the body.

The outermost layer is the epicardium. It is the visceral layer of the serous pericardium. This layer has a thin, ...

The heart wall has three layers—the epicardium, the myocardium, and the endocardium.

The outermost layer, the epicardium, is the visceral layer of the serous pericardium. Its outer surface is made of thin and transparent mesothelium, while the inner layer is made of areolar connective tissue with large fat deposits that increase with age....