Causes Symptoms Pain Diagnosis Treatment Biology Diagrams The pleura is a double-layered serous membrane that surrounds the lungs and lines the thoracic cavity. It provides a protective covering for the lungs and facilitates smooth respiratory movements. The pleura is divided into two layers—parietal pleura and visceral pleura—which are separated by the pleural cavity filled with a thin layer of pleural fluid. Each pleura can be divided into two parts: Visceral pleura - covers the lungs. Parietal pleura - covers the internal surface of the thoracic cavity. These two parts are continuous with each other at the hilum of each lung. There is a potential space between the viscera and parietal pleura, known as the pleural cavity.
Anatomy of the Pleura . There are two pleura, one for each lung. Each pleura is a single membrane that folds back on itself to form two layers. The space between the membranes (called the pleural cavity or intrapleural space) is filled with a thin, lubricating pleural fluid.
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The pleural cavity is a fluid filled space that surrounds the lungs.It is found in the thorax, separating the lungs from its surrounding structures such as the thoracic cage and intercostal spaces, the mediastinum and the diaphragm.The pleural cavity is bounded by a double layered serous membrane called pleura.. Pleura is formed by an inner visceral pleura and an outer parietal layer.
Gross anatomy. The pleura divides into: visceral pleura: covers the surface of the lung and dips into the fissures between its lobes. lines of pleural reflection outline where parietal pleura abruptly changes direction as it passes from one wall of the pleural cavity to another. Right and left parietal pleura reflect in an asymmetric manner Pleural effusions. The excessive accumulation of fluid in the pleural cavity is called pleural effusion. It is usually due to inflammation of the pleura. The progressive accumulation of fluid may cause retraction of lung towards the hilum and may displace the mediastinum to the opposite side. The fluid may be in the form of:
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Embryology. The visceral and parietal pleura derive from the splanchnic and somatic mesoderm, respectively. The pleural cavity develops between the fourth and seventh weeks of gestation, during which the lung buds expand to contact and fuse with the visceral pleura. By the end of the third month, the lung buds are pushed fully into and are invaginated by the visceral pleura, completing the A pleura is a serous membrane that folds back on itself to form a two-layered membranous pleural sac. The outer layer is called the parietal pleura and attaches to the chest wall. The inner layer is called the visceral pleura and covers the lungs, blood vessels, nerves, and bronchi. There is no anatomical connection between the right and left pleural cavities.[1] See Image. Lung Anatomy. With The pleura is a double-layered serous membrane that covers each lung and lines the thoracic cage.The outer layer (parietal pleura) attaches to the chest wall.The inner layer (visceral pleura) covers the lungs, neurovascular structures of the mediastinum and the bronchi.The space between the parietal and visceral pleurae is called the pleural cavity which contains a small amount of serous fluid