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Fibrous Pericardium. Continuous with the central tendon of the diaphragm, the fibrous pericardium is made of tough connective tissue and is relatively non-distensible. This rigidity prevents rapid overfilling of the heart, but can have several serious clinical consequences (see cardiac tamponade).
The pericardium (from the Greek ÏÎµÏÎ¯, around and ÎºÎ¬ÏÎ´Î¹Î¿Î½, 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.he space between the two layers of serous pericardium (see below), the pericardial cavity, is filled with serous fluid which protects the heart from any kind of external jerk or shock. There are two layers to the pericardial sac: the outermost fibrous pericardium and the inner serous pericardium.