. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE VBINARY APPARATUS. 571 which enter with them into the organ, (Some authors—among them Leyh— describe, in addition to this capsula propria, a thin layer formed by the condensed areolar matrix of the kidney, from which it can be easily torn.) Proper Tissue.—The glandular tissue of the kidneys {areola parmchyma, or matrix) has, externally, a reddish-brown colour, more or less deep in different individuals. It is dense and friable, and easily torn when deprived of its fibrous capsule. Its substance is not everyw
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE VBINARY APPARATUS. 571 which enter with them into the organ, (Some authors—among them Leyh— describe, in addition to this capsula propria, a thin layer formed by the condensed areolar matrix of the kidney, from which it can be easily torn.) Proper Tissue.—The glandular tissue of the kidneys {areola parmchyma, or matrix) has, externally, a reddish-brown colour, more or less deep in different individuals. It is dense and friable, and easily torn when deprived of its fibrous capsule. Its substance is not everywhere homogeneous : very dark-coloured externally, where it forms the cortical layer, it becomes whiter around the pelvis, where it constitutes the medullary layer; where the latter comes in contact with the former, and sometimes even near the pelvis, it assumes a tint like that of wine. These two portions are not well defined, but penetrate each other reciprocally, so as to compose, at their point of junction, irregular festoons, very readily per- ceived in a horizontal section of the kidney (Fig. 339), The cortical is also distinguished from the medullary substance by its granular Fig. HORIZONTAL LONGITUDINAL SECTION OF THE HORSE'S KIDNEY. a, Cortical (or vascular) portion ; 6, medullary (or tubular) portion ; c, peripheral portion of the latter; d, interior of the pelvis; d', d', arms of the pelvis; e, border of the crest; /, infundi- bulum; g, ureter. aspect, and the presence of minute, reddish spheres, readily visible to the naked eye, and named Malpighian corpuscles ; while the medullary substance appeal's to be composed of radiating fibres. In the Horse, the tissue of the kidney cannot be divided into lobules or pyramids ; to the naked eye it appears to be composed of fibres that start from every part of its exterio", and converge towards the crest of the pelvis, A micro- scopical examinition demonstrates these fibres to be canals or tubes ; hence they ar
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