Parietal pericardium

Parietal Pericardium

The Parietal Pericardium is a thin, double-layered sac that encloses the heart and the roots of the great vessels. It is a key component of the pericardium, which is the protective covering of the heart. The parietal pericardium is the outer layer of the pericardium and is made up of two layers: the fibrous pericardium and the serous pericardium.

Structure

The parietal pericardium is composed of two layers. The outer layer, known as the fibrous pericardium, is tough and inelastic, providing protection to the heart and anchoring it to the surrounding structures. The inner layer, or serous pericardium, is thinner and secretes a fluid that lubricates the heart and prevents friction between the heart and the outer layer of the pericardium.

Function

The main function of the parietal pericardium is to protect the heart and maintain its position in the thorax. The fibrous layer of the parietal pericardium prevents over-expansion of the heart, while the serous layer reduces friction between the heart and the pericardium.

Clinical significance

Diseases and conditions that affect the parietal pericardium can have serious implications for heart function. These include pericarditis, an inflammation of the pericardium, and pericardial effusion, a condition where excess fluid accumulates in the pericardial space.

See also

• Heart
• Pericardium
• Pericarditis
• Pericardial effusion

References

Parietal pericardium Resources
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