Pericardium

The fibroserous sac enclosing the heart and the roots of the great vessels, composed of external (fibrous) and internal (serous) layers.
Adherent pericardium: one abnormally connected with the heart by dense fibrous tissue.
Fibrous pericardium: the external layer of the pericardium, consisting of dense fibrous tissue.
Parietal pericardium the parietal layer of the serous pericardium, which is in contact with the fibrous pericardium.
Serous pericardium: the inner, serous portion of pericardium, consisting of two layers, visceral and parietal; the space between the layers is the pericardial cavity.
Visceral pericardium: the inner layer of the serous pericardium, which is in contact with the heart and roots of the great vessels. Called also .