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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 ?
if she could catch sight of the booger, maybe find out what kind of
A couple of years later, when de Vries was ready to turn his back on the professional game, Boogers signed him for Dordrecht after a chance meeting as he prepared to board a bus.
Boogers played three times as a substitute before emerging after a break in Holland to deny reports that he was "mentally unfit" and living in a caravan.
Boogers is now set for a cut-price move to Groningen of Holland after nearly a season on loan.
John the Guardian of Our Lady Parish and gifted singer, Boogers looked forward to singing "Oh, Holy Night" at Mass each Christmas and regularly entertained restaurant patrons with a medley of his favorite songs, many of them traditional Irish pieces, especially "Danny Boy".
He has been tipped to move on from '90 after forming a free-scoring partnership with former West Ham striker Markus Boogers.
For it's the successful bass angler who knows when to use ``bubbas and boogers.
AT MASQUERADE some girl was like "Who is that guy that just shot boogers on me and threw a beer bottle at my head?
Heerenveen have no star names but include Marco Boogers, who walked out of Upton Park three years ago after just four appearances and went to live in a caravan, and South African World Cup keeper Hans Vonk.
Up front, one-time West Ham striker Marco Boogers played 15 minutes, got sent off and disappeared to live in a Dutch caravan park.
But for every Di Canio signed there was a Boogers, Dumitrescu, Radiciou.