Mucus is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells. It is a viscous colloid containing inorganic salts, antimicrobial enzymes, immunoglobulins, and glycoproteins such as lactoferrin and mucins, which are produced by goblet cells in the mucous membranes and submucosal glands. Mucus serves to protect epithelial cells in the linings of the respiratory, digestive, and urogenital systems, and structures in the visual and auditory systems from pathogenic fungi, bacteria and viruses. Most of the mucus in the body is produced in the gastrointestinal tract. Amphibians, fish, snails, slugs, and some other invertebrates also produce external mucus from their epidermis as protection against pathogens, and to help in movement and is also produced in fish to line their gills.

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MIT Scientists Discover Molecules in Mucus That Can Fight Fungal Infection

Molecules found in mucus can thwart fungal infection

Red Sea dolphins slather their skin in coral mucus, because nature is wonderfully gross

Dolphins Rub against Mucus-Oozing Corals to Soothe Skin

Coral reefs have conveyor belts of mucus running across their surface

Watch coral reefs ‘eat’ using conveyer belts made of mucus

Mucus could explain why SARS-CoV-2 doesn't spread easily from surfaces

Beset in mucus, coronavirus particles likely travel farther than once thought, study finds

A Frothy Mucus Nest Protects Frog Eggs from Drought

Common environmental pollutants damage mucus structure, function

Common Environmental Pollutants in Air and Water Damage Our Mucus Structure and Function

New research identifies key set of signals that control mucus production in the lung

Mucus and mucins may become the medicine of the future

Mucus and mucins may become the medicine of the future

Mucus and mucins may become the medicine of the future