Textbook of normal histology: including an account of the development of the tissues and of the organs . ules ;Irregular tubules ;Distal convoluted tubules ;Arched collecting: tubules. 196 NORMAL HISTOLOGY. Medullary ray contains Medulla contains : ( Spiral tubules ; < Ascending limbs ofHenles loops ;I Straight collecting tubules. Descending limbs of Henle1s loops ; The loops ; Ascending limbs of the loops ; Collecting tubules of all sizes. While the labyrinth is characterized by the irregular and tortuouscourse of its tubules, the medullary ray and the medulla are dis-tinguished by the lon
Textbook of normal histology: including an account of the development of the tissues and of the organs . ules ;Irregular tubules ;Distal convoluted tubules ;Arched collecting: tubules. 196 NORMAL HISTOLOGY. Medullary ray contains Medulla contains : ( Spiral tubules ; < Ascending limbs ofHenles loops ;I Straight collecting tubules. Descending limbs of Henle1s loops ; The loops ; Ascending limbs of the loops ; Collecting tubules of all sizes. While the labyrinth is characterized by the irregular and tortuouscourse of its tubules, the medullary ray and the medulla are dis-tinguished by the longitudinal, generally parallel arrangement of theircomponents. The wall of all parts of the tubule consists of the basement-mem-brane and the lining epithelium ; the variations in the character ofthe latter are so numerous that it is desirable to consider each portionof the tubule in detail. 1. The capsule, the expanded and invaginated blind terminationof the uriniferous tubule, is lined with a single layer of large, flattenedepithelium, resembling endothelial plates. This covers, likewise, Fig. Portions of the various divisions of the uriniferous tubules drawn from sections of human kidney :A, Malpighian body; x, squamous epithelium lining the capsule and reflected over the glomerulus ;y, z, afferent and efferent vesse s of the tuft ; e, nuclei of capillaries; n, constricted neck markingpassage of capsule into convoluted tubule; B, proximal convoluted tubule; C, irregular tubule; Dand F. spiral tubules ; E, ascending limb of Henles loop ; G, straight collecting tubule. the portion reflected over the glomerulus. In ordinary preparationsthe presence of the cells is indicated by the delicate spindle nucleiseen in profile ; the numerous nuclei seen within the tissues of the THE URINARY ORGANS. jg^ glomerulus include those of the walls of the blood-vessels and of theinterstitial tissue, as well as those of the capsular epithelium. 2. At the neck the flattened epithelium abrupt
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
