. General surgical pathology and therapeutics, in fifty lectures : a textbook for students and physicians. to do with theformation of the callus; a large extravasation is disturbing here, as inhealing of wounds of the soft parts, for part of it must be organized,while the remainder is absorbed. The inflammatory new formationhere, also, at first consists of small round cells, which increase greatlyin number, and infiltrate the tissues mentioned, and then almost taketheir place. Before following the fate of this cell-formation further, Imust briefly consider its course in the Haversian canals. T
. General surgical pathology and therapeutics, in fifty lectures : a textbook for students and physicians. to do with theformation of the callus; a large extravasation is disturbing here, as inhealing of wounds of the soft parts, for part of it must be organized,while the remainder is absorbed. The inflammatory new formationhere, also, at first consists of small round cells, which increase greatlyin number, and infiltrate the tissues mentioned, and then almost taketheir place. Before following the fate of this cell-formation further, Imust briefly consider its course in the Haversian canals. The cell-in-filtration in the connective tissue of the medullary cavity offersnothing peculiar, except that the fat-cells of the medulla disappearin the mass as the wandering cells take possession of the the following figure (Fig. 48) to represent the surface, or thefractured surface, of a bone on which, as you know, the Haversiancanals open; in these canals lie blood-vessels, surrounded by someconnective tissue. If this bony surface be in the vicinity of a fracture, numerous Diagram of a longitudinal section through the cortical substance of a long Done, o, surface,% Haversian canals, with blood-vessels and connective tissue; c. periosteum. Magnified403 diameters. 186 SIMPLE FRACTURE OF BONES. cells first come between the connective tissue in the Haversian canals;should this cell-infiltration be very rapid, it would entirely compressthe blood-vessels, and cause the death of the bone, a process whichwe shall hereafter learn. But, if the cell-increase in these canals goeson slowly, their walls are gradually absorbed, as it would appear, bythe inflammatory new formation itself; the canals are dilated, the cellsfill them, and at the same time the blood-vessels increase by formingloops. From the observations of Cohnheim, we must suppose that ininflammation of bone, also, the young cells in the Haversian canalsare not newly formed, but are white blood-cells
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