It is also present in the mesothelium of the thoracic cavity and the parietal pericardium.
2.
One layer, called the visceral pericardium, adheres to the heart; the other layer, the parietal pericardium, encloses it.
3.
Embryos lacking " Osr1 " expression usually die before birth due to deformed atrioventricular junctions and hypoplastic venous valves; the ones that progress to term also have an incomplete parietal pericardium.
4.
Air between the anterior parietal pericardium and the thoracic cage may also give rise to the Hamman s Sign which is a crunching sound typically heard on auscultation of the chest, but may sometimes be heard even with the unaided ear.
परिभाषा
the tough outermost layer of the pericardium that is attached to the diaphragm and the sternum