Mucin

Mucin is a type of protein responsible for forming mucus, a thick, slippery substance that lines and protects various parts of the body, such as the respiratory and digestive tracts. It acts as a barrier against bacteria, viruses, and irritants, while also trapping particles to help clear them out. Mucin molecules can absorb water, giving mucus its gel-like consistency. This protective layer is essential for maintaining healthy tissues and supporting the immune system’s defense mechanisms. In essence, mucin plays a crucial role in keeping internal surfaces lubricated, moist, and shielded from infection and damage.