820 



A MANUAL OF ANATOMY 



acute angles, and so become less numerous and at the same time 

 larger. They run in straight, slightly converging lines towards the 

 apex of a papilla, where they are very much reduced in numbers. 



Cortex 



Papillary Portion 



Fig. 354. — Diagram of the Uriniferous Tubules of the Kidney (Klein> 



a and a', Outer and Inner Zones of Cortex, which are free from 



Malpighian Corpuscles. 



1. I. Capsule of Bowman 4. 4. Spiral Tubule 



2. 2. Neck of Capsule 5. 5. Descending Limb of Henle s Loop 



3. 3. Proximal Convoluted Tubule 6. 6. Loop of Henle 



7. 7., 8. 8., 9. 9., Ascending Limb of Henle's Loop 

 10.10. Irregular Tubule 13., 14. Straight Collecting Tubule 



11. II. Distal Convoluted Tubule 15. Excretory Tube or Duct of Belhni 



12. 12. Junctional Tubule 



but of large size. In this final part of their course each straight 

 collecting tubule forms the excretory tube or duct of Bellini. These 

 excretory tubes open on the apex of a papilla, where there is often 



