The parietal and visceral pleurae are actually two parts of a single,continuous membrane.

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The parietal and visceral pleurae are two parts of a single, continuous membrane known as the pleural membrane. The parietal pleura lines the walls of the thoracic cavity, while the visceral pleura covers the surface of the lungs. These two layers are joined at the pleural cavity, which is filled with a small amount of pleural fluid that allows the pleurae to slide smoothly against each other during breathing.

The Parietal and Visceral Pleurae Are Actually Two Parts of a Single,continuous