. Text-book of normal histology: including an account of the development of the tissues and of the organs. ex-tending between the sidesof the Malpighian pyra-mids as far as the pelvisconstitute the columnsof Bertini, and are trav-ersed by the large blood-vessels. At certain points alongtheir bases the striae of theMalpighian pyramids arecontinued into the cortexas slender, tapering bun-dles of parallel tubules,which form the medul-lary rays, or pyramidsof Ferrein. By thepenetration of these bun-dles the cortex is sub-divided into the med-ullary rays and thelabyrinth, the latter ap-propriately
. Text-book of normal histology: including an account of the development of the tissues and of the organs. ex-tending between the sidesof the Malpighian pyra-mids as far as the pelvisconstitute the columnsof Bertini, and are trav-ersed by the large blood-vessels. At certain points alongtheir bases the striae of theMalpighian pyramids arecontinued into the cortexas slender, tapering bun-dles of parallel tubules,which form the medul-lary rays, or pyramidsof Ferrein. By thepenetration of these bun-dles the cortex is sub-divided into the med-ullary rays and thelabyrinth, the latter ap-propriately so named onaccount of the great tortuosity of the component uriniferous dark-red points irregularly studded over the labyrinth indicatethe position of the Malpighian bodies. In sections parallel tothe free surface the medullary rays appear as groups of tubules sur-rounded by the labyrinth on all sides. The blood-vessels of the labyrinth are enveloped in connectivetissue, which latter represents the interlobular tissue of otherglands and the boundaries of the primary lobules. The secreting. Section of human kidney, including cortex and portion ofmedulla, showing general arrangement of tissues. Cortex(C) is imperfectly subdivided by bundles of parallel tubulesconstituting the medullary rays (m) ; between these lies thelabyrinth (/) containing the Malpighian bodies {jc) ; in places(jr) the glomerulus has fallen out, leaving the empty capsule ;i and v, sections of blood-vessels. THE URINARY ORGANS. 193 Fig. 236. parenchyma of the organ is held in place by the interstitial con-nective tissue ; this is present -between the tubules in most parts ofthe kidney in very small quantities,—the immediate vicinity of theMalpighian bodies and the papillary region of the medulla beingexceptions, since considerable amounts of the interstitial tissue arepresent in these localities. The connective tissue of the kidney be-comes-condensed at the periphery of the organ, where it forms a
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