👉 Basement fluid, also known as peritoneal fluid, is a clear, colorless liquid found in the cavities surrounding the organs within the abdominal cavity. It plays a crucial role in lubricating and protecting these organs, as well as facilitating the exchange of nutrients and waste products. This fluid is produced by the mesothelial cells lining the cavity and is constantly being replaced through filtration from the blood. The balance between production and absorption is vital for maintaining a healthy environment within the abdominal cavity, and any disruption can lead to conditions like ascites or effusion.