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

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 ?
Mucous membrane pemphigoid is generally diagnosed with a combination of clinical and immunopathological findings.
Changes in the organization of the colon mucus membrane: rats from the normal group had intact colon mucous membranes without inflammatory cell infiltration or ulceration.
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after contact with body fluids or excretions, mucous membranes, nonintact skin, and wound dressings
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First, in only a limited number of ways can the virus be passed from one person to another: a) injection of infected blood directly into the blood stream or through the integument, or b) passage of the virus by blood or other infected secretions through mucous membranes.
In addition, Decapeptyl([R]) is also indicated in the treatment of uterine fibroids (a benign tumour of muscle tissues in the uterus), endometriosis (proliferation of endometrial tissue, the mucous membrane that lines the uterine wall outside the reproductive tract), prior to surgery or when surgery is not deemed appropriate, as well as early-onset puberty and female infertility (in vitro fertilisation).
Epistaxis is the medical term for a nosebleed - loss of blood from the mucous membrane that lines the nose, most often from inside one nostril only.
Then a friend, who is a biochemist, suggested Omega 7 ( the essential fatty acids feed the mucous membrane and help dryness.
The ostium is usually protected by a fold of mucous membrane called Hasner's valve.
To register as a smell, molecules wafting into a nostril must cross a mucous membrane and hit a receptor.
Total quantity or scope: Part 1 Sebtoillettre is suitable for skin and mucous membrane disinfectants.