. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. ZC FIG. 228.—DIAGRAM OF THE DEVELOPMENT OF A TOOTH. By, connective tissue follicle or sac surrounding the tooth ; DS, dentine ; EM, epithelium of mouth ; Ma, enamel epithelium ; 0, odontoblasts ; SK, dental lamina ; ZK, dental papilla. FIG. 229.—SEMIDIAGRAMMATIC FIGURE OF A LONGITUDINAL SECTION THROUGH A TOOTH. PH1, aperture of the pulp-cavity (PH); ZB, dentine : ZC, cement ; ZS, enamel. enlarged distally at certain points to form the so-called enamel- organs. These, as they grow deeper into the mesoderm, become bell-shap
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates. ZC FIG. 228.—DIAGRAM OF THE DEVELOPMENT OF A TOOTH. By, connective tissue follicle or sac surrounding the tooth ; DS, dentine ; EM, epithelium of mouth ; Ma, enamel epithelium ; 0, odontoblasts ; SK, dental lamina ; ZK, dental papilla. FIG. 229.—SEMIDIAGRAMMATIC FIGURE OF A LONGITUDINAL SECTION THROUGH A TOOTH. PH1, aperture of the pulp-cavity (PH); ZB, dentine : ZC, cement ; ZS, enamel. enlarged distally at certain points to form the so-called enamel- organs. These, as they grow deeper into the mesoderm, become bell-shaped, and enclose modified masses of connective tissue, the dental papilla; the upper cells of the papillse, those next to the enamel-organ, are known as odontoblasts (Fig. 228). The epithelial and connective tissue germs come into the closest rela-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, Macmillan and co. , limited
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