Central fibrous body of heart

The central fibrous body of the heart is a dense, collagenous structure that forms part of the fibrous skeleton of the heart. It is located at the base of the heart, at the intersection of the atrioventricular and interventricular septa, and provides structural support and electrical insulation between the atria and ventricles. The central fibrous body anchors the attachment of the right and noncoronary cusps of the aortic valve, the septal leaflet of the tricuspid valve, and the anterior leaflet of the mitral valve. It also contains the atrioventricular (AV) portion of the cardiac conduction system, including the penetrating bundle of His.