n. a muscular layer of the wall of a hollow organ (such as the stomach) or a tubular structure (such as the intestine or the ureter). The muscularis mucosae is the muscular layer of a mucous membrane complex, especially that of the stomach or intestine.
(mucosa) 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.... mucous membrane
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