. The comparative anatomy of the domesticated animals. Veterinary anatomy. 124 THE cavities are elongated and directed almost perpendicularly towards^ the articular surface in the deep layer; in the middle layer they are oblique, and are parallel to the surface of friction in the superficial layer. (Under a high magnifying power ^^S- '^^- the fundamental substance, or matrix, loses its homogeneous and amorphous character, and appears to be granular or faintly striated. In the midst of this granular matrix, the lacunae or cavities are observed to contain from one to six differen
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 124 THE cavities are elongated and directed almost perpendicularly towards^ the articular surface in the deep layer; in the middle layer they are oblique, and are parallel to the surface of friction in the superficial layer. (Under a high magnifying power ^^S- '^^- the fundamental substance, or matrix, loses its homogeneous and amorphous character, and appears to be granular or faintly striated. In the midst of this granular matrix, the lacunae or cavities are observed to contain from one to six different-sized cells. It has been stated that a membrane lines these spaces. In addition to the granular matter observed in the cells, it is not rare to find fat globules. The nuclei of the cells vary from ¥oV^ to ^0^ of an inch in diameter. The cells multiply endogenously.) The cartilage cells are insoluble in boiling water; consequently, so far as their chemical composition is con- cerned, they are distinct from the fundamental substance. The diarthrodial cartilages receive neither vessels nor nerves. The presence of cartilages of incrustation in the articulations is of the greatest importance. When they are worn, absorbed, or transformed into bone in consequence of certain articular maladies, the movements become painful and very difficult. With regard to the part they play in the economy, it may be said that: 1, They favour, by their smoothness, the gliding and displace- ment of the bones; 2, They attenuate, by their suppleness and elasticity, the violent shocks to which the articulations are exposed; 3, They resist the wear and deformation of the articular surfaces. • Complementary Fibro-cartilages.—There are several kinds of com- plementary fibre-cartilages :—Some (interosseous) represent circular cushions which bolster the margins of certain cavities, filling up the notches which might render them imperfect. They increase the depth of these cavities Fig. 77. SECTION OF B
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
