So the heart can be divided into three layers. We have the epicardium, the outermost layer. We have the myocardium, the middle layer, and we have the inner layer of the heart known as the endocardium. So this layer, the epicardium, is actually physically attached. It's fused with our visceral layer of the inner pericardium. So this visceral layer of the inner pericardium is attached to the epicardium, this layer of the heart.