mucous membrane

mucous membrane
mucous membrane n a membrane rich in mucous glands specif one that lines body passages and cavities which communicate directly or indirectly with the exterior (as the alimentary, respiratory, and genitourinary tracts), that functions in protection, support, nutrient absorption, and secretion of mucus, enzymes, and salts, and that consists of a deep vascular connective-tissue stroma which in many parts of the alimentary canal contains a thin but definite layer of nonstriated muscle and a superficial epithelium which has an underlying basement membrane and varies in kind and thickness but is always soft and smooth and kept lubricated by the secretions of the cells and numerous glands embedded in the membrane called also mucosa compare SEROUS MEMBRANE

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the moist membrane lining many tubular structures and cavities, including the nasal sinuses, respiratory tract, gastrointestinal tract, biliary, and pancreatic systems. The surface of the mouth is lined by mucous membrane, the nature of which varies according to its site. The mucous membrane consists of a surface layer of epithelium, which contains glands secreting mucus, with underlying layers of connective tissue (lamina propria) and muscularis mucosae, which forms the inner boundary of the mucous membrane.

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tunica mucosa.

Medical dictionary. 2011.

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