A bezel is a narrow piece of metal used to hold a gem in place on a piece of jewelry. The bezel surrounds the gemstone all the way around. A bezel is also the part of the watch surrounding the crystal on a watch face that holds the crystal in place. Bezels may or may not be set with gems and may or may not be textured.
The lungs are surrounded by a double membrane called pleura. This membrane has two layers, a parietal pleura and a visceral pleura. The parietal pleura is attached to the chest wall and the visceral pleura covers the surface of the lungs.Between these layers of pleura is a potential space i.e. a space that doesnât exist but it could exist if something goes wrong.his membrane has two layers, a parietal pleura and a visceral pleura. The parietal pleura is attached to the chest wall and the visceral pleura covers the surface of the lungs.
It has two layers: 1) The parietal layer (which makes contact with the body wall) 2) The visceral layer (which surrounds the â¦ lungs) While it has these two layers, the pleural membrane is in fact one continuous 'bubble' of membrane-the fact the lungs are inside it gives it it's two layers.leural visceral lung pleura. parietal pleura lines the thoracic wall and diaphrag â¦ m. it is the pleura The membranes that surround the lungs are collectively called the Plurae.