What is the function of pericardial fluid? Where is it found?

Pericardial fluid is a clear, serous fluid that fills the pericardial cavity, which is the space between the two layers of the pericardium, a membranous sac that surrounds the heart. The pericardium consists of two layers: the outer fibrous pericardium and the inner serous pericardium.

The function of pericardial fluid includes:

Lubrication: Pericardial fluid acts as a lubricant, reducing friction between the layers of the pericardium as the heart beats and moves within the chest cavity.

Cushioning: The fluid provides a cushioning effect, helping to protect the heart from external forces or shocks.

Facilitating heart movement: Pericardial fluid allows the heart to move freely within the chest cavity during contractions and relaxations, without being impeded by friction against surrounding structures.

Overall, pericardial fluid plays a crucial role in maintaining the normal functioning and health of the heart by reducing friction and providing protection against mechanical stress.