👉 Mucus, often referred to as "mucoid fluid" in scientific contexts, is a viscous, gel-like substance produced by various epithelial surfaces, including those of the respiratory, gastrointestinal, and urogenital tracts. It plays a crucial role in protecting and lubricating these surfaces by trapping particles, pathogens, and debris, thereby preventing them from causing damage or infection. In the respiratory system, for example, mucus traps inhaled particles and pathogens, while in the gastrointestinal tract, it aids in moving food through the digestive system and protects against harmful bacteria. Mucus also contains mucus-associated proteins that have antimicrobial properties, further enhancing its protective function. This fluid is essential for maintaining the health and integrity of mucosal surfaces throughout the body.
