"The pericardium (from the Greek \u03C0\u03B5\u03C1\u03AF, \"around\" and \u03BA\u03AC\u03C1\u03B4\u03B9\u03BF\u03BD, \"heart\") 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.The pericardium fixes the heart to the mediastinum, gives protection against infection, and provides the lubrication for the heart."@en . "Pericardium"@en . "137"^^ . "Pericardium"@en . . "524"^^ . . . "A07.541.795" . .