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Definition of Pericardium, parietal

Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026

Pericardium, parietal: The tough, thickened outer layer of the pericardium. The parietal pericardium loosely cloaks the heart and is attached to the central part of the diaphragm and the back of the breastbone.