Feebleness of growth and congenital dwarfism : with special reference to dysostosis cleido-cranialis / by Murk Jansen.

  • Jansen, Murk, 1867-1935.
Date:
1921
Catalogue details

Licence: In copyright

Credit: Feebleness of growth and congenital dwarfism : with special reference to dysostosis cleido-cranialis / by Murk Jansen. Source: Wellcome Collection.

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    cither side of each loop, so that it may continue its course toward new cartilage-cells. Though in Fig. 20 this differentiation is retarded or checked, the vascular loops continue to lengthen. I hey arc seen to start from the bony end of the rib. But the cartilage-cells, instead of differentiating, remain such as they are and where they are. J hat must be the cause why the loops hit—sitvenia verbo—against the cartilage- cells, get infolded and form balls, glomeruli (see Figs. 21 and 22). But Fig. 19. this at the same time is the cause of irregularities. The vessel-balls, enlarged as they are, are no longer adapted each to its column of cartilage- cells. They may meet and blend and thus separate patches of cartilage from the columns of cartilage-cells. This is seen in Fig. 23, where, moreover, a transverse strip of bone has been formed in front of the vessel balls, which have apparently fused. It is interesting to note how the normal condition may be re-established under those conditions. Fig. 24 represents vessels perforating such a transverse bone strip. The perforating vessels divide into several branches, each of which probablv