👉 A sticky fluid, also known as mucin, is a complex glycoprotein mixture that plays a crucial role in various biological processes. Primarily found in mucus, saliva, and secretions from glands throughout the body, it acts as a lubricant and protective barrier. In mucus, sticky fluid traps particles like bacteria and dust, preventing them from penetrating deeper tissues and causing infection. It also aids in swallowing by coating the tongue and throat, facilitating smooth passage of food. Moreover, mucin contributes to the structural integrity of tissues by binding cells and extracellular matrix components together, thus maintaining organ function and protecting against physical damage.