Serosa
The serosa is a smooth, thin membrane that lines certain body cavities and covers the organs within them. It is part of the serous membrane system, which includes layers such as the parietal layer that lines the cavity and the visceral layer that covers the organs. The serosa produces a lubricating fluid that reduces friction between organs, allowing them to move smoothly during bodily functions.
In humans, the serosa is found in areas like the abdominal cavity and thoracic cavity. It plays a crucial role in protecting organs such as the heart, lungs, and digestive organs. By providing a barrier and reducing friction, the serosa helps maintain the proper functioning of these vital systems.