Serosa is a term that refers to a type of membrane. This membrane is commonly found in the body and lines internal cavities. Synonyms for serosa include serous membrane and serous layer. This type of membrane is simplistic in nature and is thin and smooth. It is made up of a single layer of flattened cells that secrete a fluid that acts as a lubricant and helps organs move smoothly. Other synonyms for serosa include visceral peritoneum, visceral pleura, and visceral pericardium, depending on the specific location of the membrane in the body. In summary, these synonyms highlight the importance of the serosa in the functioning and protection of our internal organs.