mucous membrane

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Related to mucous membrane: Mucous membrane pemphigoid

mucous membrane

a mucus-secreting membrane that lines body cavities or passages that are open to the external environment
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Mucous Membrane


(also mucosa), a membrane 0.5–4 mm thick that lines the inner surfaces of the digestive and respiratory organs, the urogenital system, the accessory sinuses of the nose, the middle ear, and the excretory ducts of glands. The name “mucous membrane” is derived from mucus, a glandular secretion that keeps the surfaces of mucous membranes moist.

A mucous membrane consists of one or more epithelial layers, a connective-tissue layer, a muscle plate formed by smooth muscle cells, and a tunica submucosa. The tunica submucosa, which is on the external side of the muscle plate, consists of a flexible layer of areolar tissue that separates the mucous membrane from the tissues underneath. Depending on the functions of the particular organ, mucosal epithelium may be multilay-ered and flat or monolayered and cylindrical, prismatic, cubical, or ciliated (in the airways). Its surface may be smooth, plicate, or villous; for example, in the small intestine the mucous membrane forms folds, villi, and crypts.

Located in the mucous membrane and tunica submucosa are glands, terminal nerve branches, blood and lymphatic vessels, and masses of lymphoid tissue, for example, follicles and tonsils. Mucous glands may be unicellular or multicellular. Unicellular mucous glands consist of goblet cells located between surface epithelial cells. Multicellular mucous glands may be simple tubular or alveolar glands, which are found in the stomach and small intestine, or complex mucous glands, which are found in the digestive tract and the airways.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

mucous membrane

[′myü·kəs ′mem‚brān]
The type of membrane lining cavities and canals which have communication with air; it is kept moist by glandular secretions. Also known as tunica mucosa.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Further studies need to be conducted to compare rituximab to other therapies and define the optimal protocol to be used for treatment of mucous membrane pemphigoid [9,10].
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After administration of the medication, we discovered improvements in the health of mucous membrane tissues and in the gland structure of the large and medium dose intervention groups.
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* after contact with body fluids or excretions, mucous membranes, nonintact skin, and wound dressings
In low but sufficient aggregate concentration, such compounds can irritate the mucous membranes of the eyes and respiratory system.
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It is made up of muscle, connective tissue, and mucous membrane. No one seems to know the purpose of the uvula.
This step exposes two triangles of mucous membrane. The tip of each triangle is grasped with a forceps and stretched away from the corona (bottom--row, middle).