Answer:
The pericardium is a double-walled sac containing the heart and the roots of the great vessels. The pericardial sac has two layers, a serous layer and a fibrous layer. It encloses the pericardial cavity which contains pericardial fluid.
Latin: Pericardium
Location: A sac around the heart
Artery: Pericardiacophrenic artery
