THE KIDNEYS AND URINE. 



349 



made up of several distinct sections which differ from one another MTV 

 markedly, both in situation and structure. According to Klein, the fol- 

 lowing segments maybe made out: (1) The Malpighian corpuscle (Figs. 



FIG. 240. A Diagram of the sections of uriniferous tubes. A, Cortex limited externally by the 

 capsule : 

 without Mali 



tubule of Schachowa* 5. descending lirnb of Henle's loop: 6, the loop proper; 7, thick part of the as- 

 cending limb; 8. spiral part of ascending limb; 9, narrow ascending limb in the medullary ray; 10, 

 the irregular tubule; 11. the intercalated .section of Schweigger-Seidei, or the distal convoluted tubule; 

 12, the curved collecting tubule: 13, the straight collecting tubule of the medullary ray: 14. the col- 

 lecting tube of the boundary layer; 15. the large collecting tube of the papillary part which, joining 

 with similar tubes, forms the duct. (Klein and Noble Smith.) 



240, 241), composed of a hyaline membrana propria, thickened by a vary- 

 ing amount of fibrous tissue, and lined by flattened nucleated epithelial 



