Elements of histology / by E. Klein.

  • Edward Emanuel Klein
Date:
1884
Catalogue details

Licence: Public Domain Mark

Credit: Elements of histology / by E. Klein. Source: Wellcome Collection.

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    channels grows more transparent, the lacunae becoming enlarged and the cartilage cells more transparent. The lat- ter gradually break down, while the in- tercellular trabeculse become calcified; the lacunae them- selves, by absorp- tion, fusing with the cartilage channels. These latter there- by become trans- formed into irregu- lar cavities, which are bordered by projecting trabeculce of calcified carti- The cavities are the primary marrow cavities, and they are filled with the primary or car- tilage marrow, i.e., blood - vessels and osteoblasts, derived, as stated above, from the osteogenetic layer of the peri- osteum. (4) The osteoblasts arrange themselves by ac- tive multiplication in a special layer on the surface of the calcified cartilage trabeculse projecting into, and bor- Fig. 34.—Longitudinal Section through the entire Fcetal Humerus of a G-uinea-pig. a, Periosteum ; 6, hyaline cartilage of the epiphysis; - c, intermediate carti]aj?e at the end of the shaft; d, zone of calcification \e, periostealbone,spongy; /, endochondral bone, spongy.
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