Oral mucosae composition

The epithelial lining of the oral mucosa is composed of squamous cells with a characteristic layered stmcture formed by the process of cell maturation. The composition of this layer varies according to the tissue functions ... 

Unlike the skin, the mucosae of the oral cavity are constantly maintained moist by the continual secretion of saliva from the three major salivary glands (submandibular, parotid, and sublingual) and the minor salivary glands located in or beneath the mucosae. The thickness of the salivary film (pellicle) has been calculated to be between 70 /rm and 100 /./m [23] however, both the composition and amount of saliva produced can vary between individuals, with time of day, disease states, and drug therapy [33], all of which must be taken into account when considering the oral cavity as a site for drug delivery. 

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