Textbook of normal histology: including an account of the development of the tissues and of the organs . a-pilla (/), at whose summit osteoblasts (d) areforming young dentine (c); inner layer (a) ofenamel organ is engaged in producing layer ofyoung enamel (5); e, middle, k, outer layer ofenamel organ. Fig. 186. THE DIGESTIVE TRACT. ,r, fibres ; the canals left within the matrix to maintain the nutritionof the tissue constitute the dentinal tubules, the homologues ofthe lacunae and canaliculi of the continued growth the sidesof the papilla as well as the apex be-come covered by the la
Textbook of normal histology: including an account of the development of the tissues and of the organs . a-pilla (/), at whose summit osteoblasts (d) areforming young dentine (c); inner layer (a) ofenamel organ is engaged in producing layer ofyoung enamel (5); e, middle, k, outer layer ofenamel organ. Fig. 186. THE DIGESTIVE TRACT. ,r, fibres ; the canals left within the matrix to maintain the nutritionof the tissue constitute the dentinal tubules, the homologues ofthe lacunae and canaliculi of the continued growth the sidesof the papilla as well as the apex be-come covered by the layer of newly-formed dentine ; the central part ofthe dental papilla remains, after allthe dentine has been formed, as thepulp-tissue, into which the blood-vessels and nerves grow at a laterperiod. At first both dentine and enamelare soft, the impregnation with limesalts occurring subsequently ; thelayer of the soft, most recentlyformed matrix is readily distin-guished in stained sections from theolder calcified tissue. The cemen-tum, wanting during foetal life, isproduced by the alveolar ?~ .-2.
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
