Parietal pericardium
The outer layer of the pericardium which is a conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the sternum (breastbone). The inner coat is double with one layer closely adherent to the heart while the other lines the inner surface of the outer coat with the intervening space being filled with fluid. This small amount of fluid, the pericardial fluid, acts as a lubricant to allow normal heart movement within the chest. The word "pericardium" means around the heart. The inner part of the pericardium that closely envelops the heart is called the visceral pericardium or epicardium.

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parietal pericardium n the tough thickened membranous outer layer of the pericardium that is attached to the central part of the diaphragm and the posterior part of the sternum compare EPICARDIUM

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lamina parietalis pericardii serosi.

Medical dictionary. 2011.

Look at other dictionaries:

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  • Parietal — Adjective from the Latin parietalis meaning belonging to the wall that the ancient anatomists used to designate the wall, as of a body cavity. For examples, there are the: {{}}Parietal bone the main side bone of the skull. Parietal lobe the main… …   Medical dictionary

  • Pericardium, parietal — The outer layer of the pericardium which is a conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the… …   Medical dictionary

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