part of continuous with composed primarily of membrane organ fibrous pericardium FMA:9586 pericardium fibrosum MA:0002738 fibrous portion of pericardium SCTID:243953008 Membrane organ which is attached to the pericardial sac proper and the central tendon of diaphragm and is continuous with the pretracheal fascia.[FMA]. EMAPA:19029 Wikipedia:Fibrous_pericardium pericardium parietal serous pericardium thoracic segment organ areolar connective tissue