Definition: The term "seroae" is a medical term used to describe the collection of fluid (serosa) within the body. These fluids are primarily produced by the kidneys and play a crucial role in maintaining the balance of fluids, electrolytes, and other substances within the body. Serosa is composed of two distinct layers: the outermost layer known as the peritoneal lining, which acts as a protective barrier against external pathogens; and the innermost layer called the serous membrane, which