Animal physiology / by John G. M'Kendrick.

  • John Gray McKendrick
Date:
1877
Catalogue details

Licence: Public Domain Mark

Credit: Animal physiology / by John G. M'Kendrick. Source: Wellcome Collection.

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    resemble those of yellow fibrous tissue, resisting the action of acetic acid, and forming a dense matting or felt, in the meshes of which the cells lie (fig. 47, b). Yellow fibro- cartilage is sparingly distributed in the body, being found only in certain of the cartilages of the ear and of the larynx. Bone. 55. General Description,—'Bones are divided by anatom- ists into the long or cylindrical, the flat or tabular, and the short or irregular. The femur is an example of the first (fig. 19, p. 19), the parietal of the second (fig. 8, 2, p. 12), and the astragalus of the third (fig. 21, i, p. 20). When any Fig. 48-—Bone: A, longitudinal section, shewing ramifications of Haversian canals, a, c, d, e, and f, f, lacunae and canaliculi. B, transverse section, shewing one complete Haversian system, a ; part of another, b ; and an outer lamina, e, e; a is the transverse section of a Haversian canal. C, bone cor- puscle in lacuna, highly magnified; b, bone corpuscle, a mass of protoplasm ; a, space between it and bony matter. of these bones is sawn across, two kinds of bony tissue are seen—a hard compact part next the surfaces of the bone, and a spongy or cancellated part formed of bands and plates in the centre. In the centre of a long bone there is a canal termed the medullary ca7ial, filled with a soft, reddish, pulpy substance called the marrow. The marrow, when examined microscopically, shews fat cells, large nucleated cells (fig, 30; a), and blood-corpuscles. In the cancellated
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