Manual of human histology . belongs, and consists of an internal portion rich in vessels,and eventually in nerves also, and of a non-vascular externalportion. The latter is bounded by a delicate structurelessmembrane, the membrana praformativa (Easchkow), which hasno further relation to the development of the tooth. Beneaththis, lie cells of 0-016—0-024 in length, and 0002—0-0045 Fig. 196. A, tooth-sac of the second incisor of an eight-months foetus, fromthe broad surface, x 7: a, dental sac; b, enamel pulp; c, enamel membrane;d, enamel; e, dentine; /, dentinal cells; g, limits of the cap of d
Manual of human histology . belongs, and consists of an internal portion rich in vessels,and eventually in nerves also, and of a non-vascular externalportion. The latter is bounded by a delicate structurelessmembrane, the membrana praformativa (Easchkow), which hasno further relation to the development of the tooth. Beneaththis, lie cells of 0-016—0-024 in length, and 0002—0-0045 Fig. 196. A, tooth-sac of the second incisor of an eight-months foetus, fromthe broad surface, x 7: a, dental sac; b, enamel pulp; c, enamel membrane;d, enamel; e, dentine; /, dentinal cells; g, limits of the cap of dentine; h, dentalpulp; i, free edge of the enamel organ. B, first incisor of the same embryo fromthe narrow surface : letters as before; a, dentinal cap in toto ; Jc, nerves and vesselsof the pulp. [They have a diameter of from 0-24—0-36, and are composed throughout ofnumerous concentric layers of ordinary epithelial plates, or of softer scales, vpithcholesterine crystals and granules. Besides these, microscopic bodie
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Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
