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A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue .
Mucous cells of the stomach lining secrete mucus (pink) into the lumen. Mucus (/ ˈ m j uː k ə s /, MEW-kəs) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells.
As its Latin name indicates, it is a characteristic component of the mucosa, or the mucosa's "own special layer." Thus, the term mucosa or mucous membrane refers to the combination of the epithelium and the lamina propria. [1] The connective tissue of the lamina propria is loose and rich in cells.
Fusion of the vesicles to the plasma membrane causes release of the mucin, which as it exchanges Ca 2+ for Na + expands up to 600 fold. The result is a viscoelastic product of interwoven molecules which, combined with other secretions (e.g., from the airway epithelium and the submucosal glands in the respiratory system ), is called mucus .
The definition of the topical route of administration sometimes states that both the application location and the pharmacodynamic effect thereof is local. [ 3 ] In other cases, topical is defined as applied to a localized area of the body or to the surface of a body part regardless of the location of the effect.
"It is produced by your mucous membranes and coats your mouth, nose, sinuses, throat, lungs and gastrointestinal tract." Mucus is actually the body's first line of defense against bacterial and ...
In the gastrointestinal tract, the term mucosa or mucous membrane refers to the combination of epithelium, lamina propria, and (where it occurs) muscularis mucosae. [1] The etymology suggests this, since the Latin names translate to "the mucosa's own special layer" (lamina propria mucosae) and "muscular layer of the mucosa" (lamina muscularis ...
Mucosal immunology is the study of immune system responses that occur at mucosal membranes of the intestines, the urogenital tract, and the respiratory system. [1] The mucous membranes are in constant contact with microorganisms , food, and inhaled antigens . [ 2 ]