. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. OSSEOUS TISSUE. 855 Fig. 458. temporary cartilage on the approach of ossifi- cation is that the corpuscles, instead of being solitary, are arranged in groups of variable numbers according as they are near or far off the site of immediate ossification ; that they have a linear arrangement, and where there are two or three only this is somewhat semilunar, with the straight edges near each other ; and that the greatest diameter is lateral. (See jig. 457, b.) Moreover, the columns are not continued unin- terruptedly through
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. OSSEOUS TISSUE. 855 Fig. 458. temporary cartilage on the approach of ossifi- cation is that the corpuscles, instead of being solitary, are arranged in groups of variable numbers according as they are near or far off the site of immediate ossification ; that they have a linear arrangement, and where there are two or three only this is somewhat semilunar, with the straight edges near each other ; and that the greatest diameter is lateral. (See jig. 457, b.) Moreover, the columns are not continued unin- terruptedly through the cartilage, but are broken off, and near their terminations new ones com- mence, not, however, in a line with the former, but opposite their intercolumnar spaces. (See fg- 458.) Supposing this view of the subject to be correct, as I believe it to be, the growth of a bone in its length ad- mits of easy solution, name- ly, by the developement of cartilage at the epiphyses. The formation of co- lumns having commenced, developement in the lines proceeds with rapidity, and the corpuscles composing them hold a different rela- tion to each other at each part of the same column. Thus atthe end farthest from the point of ossification the corpuscles are flattened and closely arranged, present- ing an appearance not un- like a pile of pence. But as we trace the line down to- wards the bone, each corpuscle becomes more distinct, is separated from those on either side, becomes itself enlarged, and of nearly equal dimension in each direction. (See figs. 458 and 460.) The intercellular tissue becomes distinctly visible between each corpuscle. The space also between the columns, though always consider- able, is increased when the corpuscles have undergone the above change. (See fig. 459.) Fig. Temporary cartilage, with corpuscle arran- ged in columns. a, intercolnmnar or cellular tissue j b, parietes of the cor- puscle ; c, central cavity of the corpus- Please note that these i
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