According to Textbooks …

Visceral Pleura. The layer of the Pleural Membrane that surrounds the Lungs.

According to AI …

The visceral pleura is a thin, smooth membrane that covers the surface of the lungs. It is one of the two layers of pleura, the other being the parietal pleura, which lines the inside of the chest wall. The visceral pleura adheres closely to the outer surface of the lungs and follows their contours, covering every fissure and lobe. This membrane is essential because it helps reduce friction between the lungs and the chest wall during breathing movements. It also plays a role in maintaining the negative pressure within the pleural cavity, which is crucial for proper lung expansion and function.