Textbook of normal histology: including an account of the development of the tissues and of the organs . gion is stratifiedciliated columnarin type, within thesuperficial layer ofwhich numerousgoblet-cells areinterspersed. Thetunica propria ofthis region is composed of fibrous connective tissue containing cleftsoccupied by many leucocytes, the latter frequently invading thesuperimposed epithelium ; occasional nodules of lymphoid tissueare also encountered in various parts of the mucosa. The surfaceof the tunica propria is smooth, since the usual subepithelial papillaeare here wanting. The muco
Textbook of normal histology: including an account of the development of the tissues and of the organs . gion is stratifiedciliated columnarin type, within thesuperficial layer ofwhich numerousgoblet-cells areinterspersed. Thetunica propria ofthis region is composed of fibrous connective tissue containing cleftsoccupied by many leucocytes, the latter frequently invading thesuperimposed epithelium ; occasional nodules of lymphoid tissueare also encountered in various parts of the mucosa. The surfaceof the tunica propria is smooth, since the usual subepithelial papillaeare here wanting. The mucous membrane of the respiratory region is further dis-tinguished by numerous small racemose glands, which open onthe free surface by funnel-like pits, readily recognized by the unaidedeye, and lined for some distance by epithelium corresponding to thatof the adjacent surface. These glands are mixed in character,since some acini secrete serous fluids, while others elaboratemucous products. The glandular structures occur with especialfrequence over the inferior turbinated bones, although on the lateral. Section through mucous membrane of respiratory region of childsnose: a, ciliated epithelium; b, tunica propria; c, submucous con-nective tissue ; d, mucous glands; e, duct of glands opening on freesurface; f, blood-vessels. THE NASAL MUCOUS MEMBRANE. aq^ walls and on the lower part of the nasal septum they are present inlarge numbers. As already mentioned, the veins of the mucosa areso wide and plentiful that the layer in which they lie appears likecavernous tissue. The mucous membrane lining the accessory spaces of the nasalfossae—the sphenoidal, the frontal, and the maxillary sinusesand the ethmoidal cells—closely resembles that of the respiratoryregion, being covered by a stratified ciliated epithelium, whichrests upon a thin tunica propria closely united with the tracts are chiefly distinguished from the respiratory surface bythe marked reduction in the thi
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
