(redirected from Nasal mucus)
Also found in: Dictionary, Thesaurus, Medical.
Related to Nasal mucus: Dried nasal mucus


the slimy protective secretion of the mucous membranes, consisting mainly of mucin



in animals and man, the secretion of mucous glands. In amphibians mucus is secreted onto the skin, whereas in invertebrates and other vertebrates it is secreted into the internal cavities of many organs, where it coats the mucous membranes.

Mucus is immunologically and bactericidally active. It protects organs and integumentary tissues from mechanical injuries and facilitates the movement of food along the digestive tract. Certain annelids, mollusks, ascidians, and other animals feed on food particles that adhere to the mucus when water is filtered through it.

Chemically, mucus is a complex mixture of glycoproteins, which account for approximately 40 percent of its dry weight. For example, mucus secreted by gastric and intestinal mucous epithelia is an aqueous solution of acid mucopolysaccharides, which are similar or identical to the mucopolysaccharides of connective tissue, neutral glycoproteins, which contain a large quantity of fucose, and acid glycoproteins, which contain sialic acids. Hyaluronic acid is a major constituent of synovia.

Mucus is important in maintaining cellular fluid and ion balances. In mammals it is a constituent of the developing embryo’s connective tissue, although at birth it is found only in the umbilical cord.


Khimiia uglevodov. Moscow, 1967.
Kretovich, V. L. Osnovy biokhimii rastenii, 5th ed. Moscow, 1971.
Schlegel, H. Obshchaia mikrobiologiia. Moscow, 1972. (Translated from German.)



A viscid fluid secreted by mucous glands, consisting of mucin, water, inorganic salts, epithelial cells, and leukocytes, held in suspension.
References in periodicals archive ?
We all have nasal mucus which is normal and keeps the airway passages moist.
The first factor is the presence of lysozyme, lactoferrin, and other immunologically active proteins, including immunoglobulin A (IgA), which are found in normal nasal mucus.
He also stumbled upon an additional benefit--the drug substantially ratchets down concentrations of death factors in nasal mucus.
It has been discovered that chicken contains an amino acid called cysteine that eases that bunged-up feeling by preventing inflammation of the nasal passages and thinning nasal mucus.
95 for 200 sprays Superdrug and Boots) A nasal spray that claims to increase nasal mucus to filter out allergens and stop them irritating the lungs.
Recirculation of nasal mucus occurs when secretions that have been transported out of the natural maxillary ostium return to the sinus via a surgically created or accessory ostium.
Nasal Mucus Samples From Over 2,000 Patients Confirm 70% Test Positive for Chronic Sinusitis Due to Fungal-Induced Inflammation
Upon hydration by nasal fluid, the GelVac(TM) formulation changes from dry powder particles to wet gel particles, resulting in the formation of a gel that adheres to nasal mucus, thus maximizing antigen exposure through prolonged nasal residence time and sustained antigen release.
He had nasal mucus running down his face and was soaked wet through with sweat.
The group collected nasal mucus at regular intervals between age 1 month and 24 months from 216 infants in Buffalo who had never taken antibiotics before.
Allergy symptoms such as itching, sneezing spasms and clear nasal mucus with congestion, tend to last longer than the seven to ten days of the common cold.