. Elements of histology. Histology. 6o Elements of Histology. [Chap. vn. C^).-lH?- C?s^ :-*&)-;<*?iJ-' ^6J origin. At the extremity of the shaft, however, the spongy bone is all endochondral bone, and it continues to grow into the inter- mediate cartilage as stated above, as long as the bone as a whole grows (Fig. 36). Of course the parts of this spongy bone nearest to the centre of the shaft are the oldest, and ulti- mately disappear by absorption into the central marrow cavity. In the epi- physis the spongy bone is also endo- chondral bone, and its formation is con- nected with the de
. Elements of histology. Histology. 6o Elements of Histology. [Chap. vn. C^).-lH?- C?s^ :-*&)-;<*?iJ-' ^6J origin. At the extremity of the shaft, however, the spongy bone is all endochondral bone, and it continues to grow into the inter- mediate cartilage as stated above, as long as the bone as a whole grows (Fig. 36). Of course the parts of this spongy bone nearest to the centre of the shaft are the oldest, and ulti- mately disappear by absorption into the central marrow cavity. In the epi- physis the spongy bone is also endo- chondral bone, and its formation is con- nected with the deep layer of the articu- lar cartilage. Underneath the periosteum and on the surface of the spongy endochon- dral bone at the extremity of the shaft, the periosteal bone is represented only as a thin layer, extending as far the margin of the. Fig. 36.—From a Longitudinal Section of Femur of Eabbit, through the part in which the intermediary cartilage joins the end of the shaft. a. Intermediary cartilage; 6, zone of calcified cartilage; c, zone, in which the calcified trabeculae of cartilage become gradually in- vested in osseous substance, shaded light in the figure; the spaces between the trabeculae contain marrow, and the capillary blood- vessels are seen here to end in loops; d, in this zone there is more bone formed : the greater amount the farther away from this zone. (Atlas.) as the periosteum reaches, , to articular Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Klein, E. (Edward), 1844-1925. Philadelphia : H. C. Lea's Son
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