By H. Gray
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J^Yfii^niar 1 surface for atlas. -^^i^ ^^i X\ i iJ / I Transtiei »e process. Inferior articular process. Fig. 17. xis. — ligament the latter frequently encroaching on the sides of the process. The apex is pointed, and gives attachment to the middle odontoid ligament.
GENERAL ANATOMY OF THE SKELETON 40 Osteoblasts are met with in the deeper layer of the periosteum, in the endosteum, and in the lacunae. — We do not see concentric rings, Longitudinal Section of Compact Bone (Figs. 6 and 8). and as in a transverse section, but rows of lacuna; parallel to the course of the Haversian canals The tubes are seen to branch these canals appear like half tubes instead of circular spaces. and communicate, so that each separate Haversian canal runs only a short distance.
A. Marrow, c. Endochondral bone, g. g'. Developing Haversian spaces. f, f. ) A deposit increases in quantity, so that the cells become further separated from each other. of calcareous material (calcification) now takes place in this matrix, between the rows of cells, matrix. calcified so that they become separated from each other by longitudinal coliunns of These columns are connected to one another by transverse bars of calcareous substance, and present a granular and opaque appearance. In the calcareous areas the cartilage cells reproduce so rapidly that a number of cells are seen in each large lacuna, or space, which is called a This process is succeeded by destruction of some of the columns between the Some of smaller spaces, forming thus a fewer number of larger spaces, the secondary areolae.
Anatomy, descriptive and applied. by H. Gray