The essentials of histology : descriptive and practical, for the use of students.

  • Sharpey-Schäfer, E. A. (Edward Albert), Sir, 1850-1935.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: The essentials of histology : descriptive and practical, for the use of students. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    periosteum deposit a layer or layers of fibrous lamella? upon the surface of the cartilage, and these lamelhe also become calcified (fig. 64, im). As they are formed some of the osteoblasts (o) are included between them and become bone-corpuscles. Fig. 64.—Section of phalangeal bone of human foetus, at the time of commencing ossification. (Magnified about 7.) diameters.) The cart the centre an irated from one another by dark-looking I matrix; im, layer of bone deposited underm riostenm ; o, layer of by which this layer has been formed. Some of the osteoblasts arc- already em- bedded in the new bone as lacun®. Tl becoming enlarged and ft and arranged in row.- above and below the calcified centre. At the ends of the carti age the cells are small and the groups are irregularly arranged; the fibrous periosteum is nut sharply marked <>tV from the cartilage. In the second stage some of the subperiosteal tissue eats its way through the newly formed Layer of bone and into the centre of the cal- cified cartilage (fig. 65, ir). This is freely absorbed before it, so thai large spaces are produced which are filled with osteoblasts and contain