mucus

Mucus is a thick, slippery substance produced by the body's mucous membranes, such as those lining the respiratory and digestive tracts. Its primary role is to protect and lubricate these surfaces, trapping dust, microbes, and other particles to prevent infection and irritation. It also helps keep tissues moist and supports their proper function. Normally, mucus is clear and manageable, but it can thicken or increase during illness or allergies, leading to symptoms like coughing or congestion. Overall, mucus is a vital part of the body's defense system and natural maintenance mechanism.