mucous membrane

(redirected from Mucous membranes)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

mucous membrane

a mucus-secreting membrane that lines body cavities or passages that are open to the external environment

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.

V. V. KUPRIIANOV

mucous membrane

[′myü·kəs ′mem‚brān]
(histology)
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.
References in periodicals archive ?
Colon mucous membrane morphological changes after intervention with XKJ: after the administration of Uyghur medicine Xipayi KuiJiean, tissue samples showed the following results: rat colons in the normal group showed complete mucous membranes without inflammatory infiltration or ulcerations.
As far as herbal remedies are concerned, Plantago tincture can be particularly useful and would appear to reduce the amount of inflammation present in the mucous membranes of the ear, nose and throat.
Blisters occur in the epidermis and the mucous membranes, where the IgG autoantibodies target two structural proteins of the desmosomes identified as desmoglein 1 (Dsg1) and desmoglein 3 (Dsg3).A new pemphigus antigen, desmoglein 4, has recently been discovered and implicated in the pathogenesis of PV.
Long history of traditional use and modern scientific research has proven that oils of Sea Buckthorn seeds and berry flesh have tissue regenerative, anti-inflammatory and protective effect from exogenous stress on skin and mucous membranes.
Evis Lucera - a digestive tract video scope used for observing of blood vessels in mucous membranes under infrared light.
Viruses like the nose to be cold as it is easier for them to implant in the mucous membranes, so a cold snap will see cases rise.
When hexavalent chromium particles are inhaled, large particles may be trapped in the mucous membranes of the mouth and nose.
No involvement of internal organs or mucous membranes is observed.
A spray absorbed through the mucous membranes, Sativex is much more expensive than marijuana grown by patients, which California state law allows.
Usually, the infection starts with a cold due to factors such as weather changes; or an allergy episode that causes swelling of the mucous membranes and increased production of watery mucus.
Innate immunity appears highly conserved in evolution, suggesting that similar events occur in different species, innate immunity is relatively nonspecific and acts rapidly to block pathogens at the point that they enter the body: the mucous membranes of the respiratory, digestive, and reproductive tracts.
SWITZERLAND--Swiss researchers recently investigated whether butterbur extract Ze339 could be Used as a safe and effective treatment for rhinitits, an inflammation of the nasal mucous membranes.