Final answer:
The pleural cavities contain the pleurae and two wet epithelial membranes called the pleural membranes. The pleurae consist of two layers: the visceral pleura and the parietal pleura. The pleural cavity is the space between the visceral and parietal layers.
Step-by-step explanation:
The pleural cavities contain the pleurae and contain two wet epithelial membranes called the pleural membranes. The pleurae consist of two layers: the visceral pleura, which is superficial to the lungs, and the parietal pleura, which connects to the thoracic wall, mediastinum, and diaphragm. The pleural cavity is the space between the visceral and parietal layers.