the mucous membrane lining of the mouth is called mucous membrane.
the mucous membrane lining of the mouth is called mucous membrane.
what is the mucous membrane lining of the mouth called?
mucous membrane
the mouth is the first part of the upper gastrointestinal tract and is equipped with several structures that begin the first processes of digestion. these include salivary glands, teeth and the tongue. the mouth consists of two regions; the vestibule and the oral cavity proper. the vestibule is the area between the teeth, lips and cheeks, and the rest is the oral cavity proper. most of the oral cavity is lined with oral mucosa, a mucous membrane that produces a lubricating mucus, of which only a small amount is needed. mucous membranes vary in structure in the different regions of the body but they all produce a lubricating mucus, which is either secreted by surface cells or more usually by underlying glands. the mucous membrane in the mouth continues as the thin mucosa which lines the bases of the teeth. the main component of mucus is a glycoprotein called mucin and the type secreted varies according to the region involved. mucin is viscous, clear, and clinging. underlying the mucous membrane in the mouth is a thin layer of smooth muscle tissue and the loose connection to the membrane gives it its great elasticity. it covers the cheeks, inner surfaces of the lips, and floor of the mouth.
human digestive system
the nasal mucosa lines the nasal cavity. it is part of the respiratory mucosa, the mucous membrane lining the respiratory tract. the nasal mucosa is intimately adherent to the periosteum or perichondrium of the nasal conchae. it is continuous with the skin through the nostrils, and with the mucous membrane of the nasal part of the pharynx through the choanae. from the nasal cavity its continuity with the conjunctiva may be traced, through the nasolacrimal and lacrimal ducts; and with the frontal, ethmoidal, sphenoidal, and maxillary sinuses, through the several openings in the meatuses. the mucous membrane is thickest, and most vascular, over the nasal conchae. it is also thick over the nasal septum where increased numbers of goblet cells produce a greater amount of nasal mucus. it is very thin in the meatuses on the floor of the nasal cavities, and in the various sinuses. it is one of the most commonly infected tissues in adults and children. inflammation of this tissue may cause significant impairment of daily activities, with symptoms such as stuffy nose, headache, mouth breathing, etc.
nasal mucosa