GENERAL HISTOLOGY

Detailed explanation-1: -There are two layers; the outer pleura (parietal pleura) is attached to the chest wall and the inner pleura (visceral pleura) covers the lungs and adjoining structures, via blood vessels, bronchi and nerves.

Detailed explanation-2: -The pleural cavity is a space between the visceral and parietal pleura. The space contains a tiny amount of serous fluid, which has two key functions. The serous fluid continuously lubricates the pleural surface and makes it easy for them to slide over each other during lung inflation and deflation.

Detailed explanation-3: -The visceral and parietal pleura are bound by connective tissue to the surface of the lung and inner surface of the chest wall respectively, leaving a narrow space between the visceral and parietal layers of the pleura that is the pleural cavity.

Detailed explanation-4: -The parietal pleura is thicker than the visceral one, lines the pulmonary cavities and adheres to the thoracic wall, mediastinum and diaphragm. The parietal pleura actually has four parts: costal, mediastinal, diaphragmatic and cervical pleura.