(1) On February 8, 2012 at 5:57 am Mysandie [0] said:
Learning a little Latin helped me to remember:
Most people think of the pericardium as just a double-layered, membranous sac (The Pericardial Cavity) that is around the heart. But, the pericardium is actually TRIPLE layered: the visceral layer, the parietal layer, and the fibrous layer (fibrosa).
The visceral pericardium is the inner-most layer of the pericardium, and is also known as the Epicardium as it "lays" upon the heart.
The Pericardial Cavity lies between the visceral pericardium and the parietal pericardium. This cavity is filled with pericardial fluid which serves as a shock absorber by reducing friction between the visceral and parietal layers. The parietal pericardium is an outer layering wall of the Pericardial Cavity between the pericardial membranes.
The outer-most layer is the fibrous layer (fibrosa), and contains nerves, blood vessels, and lymphatics. This is the layer that can become inflamed, called pericarditis. (As opposed to, endocarditis, which is inflammation of the insidelayer of the heart.)
The visceral pleura is deep to the parietal pleura. The visceral is closer to the lungs.
Visceral serous membranes line organs. Parietal serous membranes line cavities.
The visceral pleura is innervated by autonomic nerves that travel with the bronchial blood vessels. The parietal pleura is innervated by somatic nerves, specifically the intercostal nerves and the phrenic nerve.
Serous Membranes
parietal layer
The visceral pleura is deep to the parietal pleura. The visceral is closer to the lungs.
The parietal pleura is actually an example of a parietal membrane, not a visceral membrane. Visceral membranes cover organs, while parietal membranes line body cavities. In the case of the pleura, the parietal pleura lines the chest cavity and the visceral pleura covers the lungs.
Parietal membrane is the lining of a body cavity. Visceral membrane is the covering of each organ in a body cavity.
Visceral serous membranes line organs. Parietal serous membranes line cavities.
The parietal pleura lines the chest cavity and the visceral pleura covers the lungs. The parietal pleura is attached to the chest wall and diaphragm, while the visceral pleura is directly attached to the lungs.
The pericardium is the membrane that is constructed of a visceral and parietal layer. The visceral layer is in direct contact with the heart, while the parietal layer lines the outer surface of the pericardial sac. This double-layered membrane protects and lubricates the heart.
serous pericardium.
pericardial cavity
The serous membrane has parietal and visceral layers. The parietal layer lines the body cavity, while the visceral layer surrounds and covers internal organs. This double-layered structure reduces friction as organs move within the body.
Visceral and parietal visceral- covers the lungs, thin serous membrane parietal- lines the inner chest wall and covers diaphram
The visceral pleura is innervated by autonomic nerves that travel with the bronchial blood vessels. The parietal pleura is innervated by somatic nerves, specifically the intercostal nerves and the phrenic nerve.
2; Visceral and the Serous