260 



HUMAN ANATOMY. 



bladder. The muscular coat ceases at the base of the renal 

 papillae, but the mucous membrane becomes continuous with that 

 of the uriniferous tubules. Its epithelium is of the "transi- 



13. Straight part of col- 

 lecting tube. 

 9. Wavy part of as- 

 cending limb of 

 Henle's loop. 



Inner stratum of cor- 

 tex without Mal- 

 pighian corpuscles. J 



7 and 8. Ascending 

 limb of Henle's 

 loop tube. 



15. Tubule of Bellini. 



Subcapsular layer with- 

 out Malpighian cor- 

 puscles. 



12. First part of col- 

 lecting tube. 



11. Distal convoluted 

 tubule. 



A. CORTEX. 



10. Irregular tubule. 



3. Proximal convo- 

 luted tubule. 



9. Wavy part of as- 



cemling limb. 

 2. Constriction or 



neck. 



4. Spiral tubule. 

 1. Malpighian 



surrounded 



tuft 



by 



Bowman's capsule. 



8. Spiral part of as- 

 cending limb of 

 Henle's loop. 



B. BOUNDARY ZONK. 

 5. Descending limb of 

 Henle's loop tube. 



6. Benlesloop. 



C. PAPILLARY ZONE. 



FIG. 124. 



Diagram of uriniferous tubules: 1, Malpighian capsule; 2, proxi- 

 mal convoluted tubule; 2 b, distal convoluted tubule; 3, descending 

 limb of Henle's loop; 4, ascending limb of Henle's loop; 5, irregular 

 tubule; 6, collecting tube; a, apex of pyramid; b, base of pyramid; 

 c, cortical portion. 



