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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).
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 intimately attached to the heart and roots of the great vessels.arietal 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.