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 ?
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].
The consideration of generalized lymph nodes enlargement, pallor mucous membrane, pyrexia, pica, coughing and respiratory distress, lacrimation and exophthalmia as the major clinical markers might be pivotal in clinical diagnosis of theileriosis in the field conditions.
The mucous membrane loses its ability to form folds; therefore, after the re-establishment of acute AH by stitching the right side of the stomach fundus to the left wall of distal esophagus, there is no formation of sealing the folds of mucous membrane under the esophageal-gastric junction.
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.
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.
* 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.
Occupational exposure: reasonably anticipated skin, eye, mucous membrane, or parenteral contact with blood or other potentially infectious materials that may result from the performance of an employee's duties.
When this swelling involves the adjacent mucous membranes of the sinuses, air and mucus are trapped behind the narrowed openings of the sinuses.
It is delivering the virus to a mucous membrane, such as your mouth or nose.
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).