Principles and practice of operative dentistry . iu;. 92.—Loiiffitudiual section of lip of kitten. >; 80. ORIGIN, DEVELOPMENT, AND MORPHOLOGY OF THE TEETH. 27. Section of jaw of rab-bit embryo, showingdental ridge cut across:ec, oral epithelium; e,epithelial outgrowth cor-responding to futureenamel organ; wi, meso-blastic tissue. upriglit upon the basement membrane (Figs. 94 and 95). Other peculiarepithelial cells found in the mucous membrane of the mouth are knownas the ciliated columnar cell (Fig. 96) and the goNet-cell (Fig. 97), thefunctions of which with the mucous gland are to secrete
Principles and practice of operative dentistry . iu;. 92.—Loiiffitudiual section of lip of kitten. >; 80. ORIGIN, DEVELOPMENT, AND MORPHOLOGY OF THE TEETH. 27. Section of jaw of rab-bit embryo, showingdental ridge cut across:ec, oral epithelium; e,epithelial outgrowth cor-responding to futureenamel organ; wi, meso-blastic tissue. upriglit upon the basement membrane (Figs. 94 and 95). Other peculiarepithelial cells found in the mucous membrane of the mouth are knownas the ciliated columnar cell (Fig. 96) and the goNet-cell (Fig. 97), thefunctions of which with the mucous gland are to secrete mucus. Themucous glands are also lined with epithelial cells, usually in a singlelayer, and cuboidal or columnar in form. From the deeper strata of epithelial cells, the Malpighian layer of the? mucous membrane, the enamel organs of the teeth areformed. It is interesting to note the analogy in the mor-phology of the teeth and the hair. By comparing Figs. 98 and 99, it will be seen thatthe first rudiments of the tooth-follicle and the hair-follicle have their origin in the lower layer of epithe-lial cells,—Malpighian layer,—which dips down intothe em
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
