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.
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.
Keynote symptoms that highlight the applicability of Nat Mur include great weariness, dryness of mucus membranes and a general feeling of coldness.
If you are dehydrated the mucus membrane will dry out and when this happens it is half as effective in stopping the potentially harmful particles entering the system,'' Dr Lewis said.
In present study, animals were found weak, lethargic, pale mucus membrane, dullness, rough body coat, depression and emaciation Haematological profile revealed that sheep suffering from haemonchosis had low haemoglobin and TEC indicating severe anaemia due to loss of blood caused by blood sucking activity of Heamonchus parasite (Kadam et al.
It may be related to simple problems with the mucus membrane lining the nasal passages.
1), no retraction of neck or limbs on external stimuli and pale mucus membrane.
The general clinical examination comprise of recording of body temperature, heart rate, respiratory rate and conjunctival mucus membrane.
Earlier research linked betel nut chewing to a buildup of scar tissue under the mucus membrane, a precancerous condition.
The general parameters were recorded-rectal temperature was 103 F, rapid and weak pulse, rapid respiration, pale mucus membrane, animal was depressed, anorexic and restless.
The clinical examination of animal showed a pale visible mucus membrane, body temperature of 37.
40F temperature, pallor mucus membrane, moderate dehydration, absence of rumination, prominently swollen pre-scapular lymph nodes, haemoglobinurea, tachycardia (110/min.
Combine this with Chamomile which soothes inflamed mucus membrane and also reduces the allergy response.