Mucins are large glycoproteins that play a crucial role in the body by forming mucus, a slippery substance that protects and lubricates various surfaces. They are primarily produced by goblet cells in the epithelial tissues of organs such as the lungs, intestines, and mouth. Mucins help trap pathogens and particles, preventing them from entering the body and aiding in their removal. These proteins are characterized by their high carbohydrate content, which gives mucus its gel-like consistency. Mucins also contribute to the viscosity and elasticity of mucus, making it effective in maintaining moisture and providing a barrier against infections. Their diverse functions are essential for maintaining overall health.