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.

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 ?
Repair of the intestinal walls was measured at a grade of 0 on the Colon Mucus Membrane Tissue Damage Index (CMDI)--with some measurements tending towards grade 1.
Moreover, like aldehyde compounds, they are mucus membrane and tissue irritants so employee safety must be considered before selecting this disinfectant.
It works directly on the mucus membranes and hair-like cilia (think of these as nasal sweepers) that trap and move foreign particles and irritants to the back of the nose where they are swallowed.
on sixth day post transfusion, Table 1) revealed increase in haemoglobin concentration (3.20 gm/dl) and hematocrit (10.39 percent) along with clinical improvement in body temperature, heart rate, color of mucus membrane, feed and water intake and general alertness.
Keynote symptoms that highlight the applicability of Nat Mur include great weariness, dryness of mucus membranes and a general feeling of coldness.
"It was a deep burn and he had some internal burn as well that affected the mucus membrane (of the lungs) which helps during breathing.
``The first line of defence is the mucus membrane in the nose.
The newly designed and economical SafeMark[TM] brand disposable face shields were developed to guard against viral or bacterial contaminants that could enter the mucus membrane. The full-face shield covers a very large area of the face, yet is still very lightweight.
All are lined with a mucus membrane, and some include hair cells, or cilia.
10 (4 females and 6 males) dogs aging between 2-8 years were presented with history of dullness anorexia, fever, pale mucus membrane, lymphadenitis and tick infestation (Table 1).
Schwartz, are topical (meaning they can be applied to the skin or mucus membrane) and are expected to be safer than currently existing products for people and the environment.
It may be related to simple problems with the mucus membrane lining the nasal passages.