mucous membrane

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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.


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.
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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.
Various mucosal surfaces may be involved, including Ocular, nasal, oral, pharyngeal, laryngeal, upper respiratory, and anogenital mucous membranes.
This special light setting, caused by irradiation of two hemoglobin-absorbed wavelengths, is used to display capillary blood vessels and mucous membranes patterns.
Eucalyptus oil is said to function in a fashion similar to menthol by acting on receptors in the nasal mucous membranes, leading to a reduction in the symptoms of nasal stuffiness.
The fluid resistant masks resist body fluids and do not permit blood or other potentially infectious materials to pass through to reach the skin, nose, mouth, or other mucous membranes under normal conditions of use.
after contact with body fluids or excretions, mucous membranes, nonintact skin, and wound dressings
Symptoms of over- exposure to nitric acid are irritation of eyes, mucous membranes, and skin; delayed pulmonary edema, pneumonitis, bronchitis, and dental erosion.
when taking a pulse, or blood pressure or lifting a resident), before inserting in-dwelling urinary catheters or other invasive devices, and after contact with body fluids or excretions, mucous membranes, non-intact skin, and wound dressings.
Fixed drug eruptions are blistering or erosive allergic reactions that may appear on hair-bearing skin, mucous membranes, or modified mucous membranes.
It is important to wash your hands not only before catheterizing yourself but also before eating or performing any procedure that might involve your skin or mucous membranes.
Dryness of the air due to central heating causes drying of the mucous membranes, making it easier to catch a cold.
Aphthous: identified by apthae (blisters or flakes on mucous membranes, such as in the mouth).