3*6 



A MANUAL OF VETERINARY PHYSIOLOGY 



and efferent vessel ; when the vessels are dilated the tuft fills 

 the capsule, when they are collapsed there is a space between 



them. Fig. 93 shows the gene- 

 ral arrangement of the Mal- 

 pighian bodies, and Fig. 94 

 that of the vessels in the tuft. 

 The minute vein or efferent 

 vessel leaving the tuft breaks 

 up into capillaries around the 

 uriniferous tubule ; thus the 



Vh 



Fig. 93. — Diagram of Bloodvessels 

 of Kidney (Klein, after Ludwig). 



at, Interlobular artery ; vi, interlobular 

 vein ; g, glomerulus with its afferent 

 and efferent vessels, the latter break- 

 ing up into a plexus around the renal 

 tubules ; vb, venae rectae ; ar, arteriae 

 rectae ; vp, apex of papilla ; vs, vena 

 stellata (Stewart). 



plates seen in capillaries ; they 

 are flat polygonal cells containing a nucleus. The capsule is 

 practically the dilated beginning of a uriniferous tubule, and 



Fig. 94. — Diagram showing the Re- 

 lation OF THE MALPIGHIAN BODY 



to the Uriniferous Tubules and 

 Bloodvessels (Kirke, after Bow- 

 man). 



a, An interlobular artery ; a', branch 

 of artery passing into the glomeru- 

 lus ; c, capsule of the Malpighian 

 body forming the commencement of, 

 and continuous with /, the urinifer- 

 ous tube ; e'e'e', vessels leaving the 

 tuft forming a plexus, p, around the 

 tube, and finally terminating in e, a 

 branch of the renal vein. 



blood in the plexus of capil- 

 laries around the tubule is 

 derived from two sources — 

 viz., from the tuft, and directly 

 from the renal artery. The 

 capsule of Bowman, which sur- 

 rounds the tuft, is lined by 

 cells resembling the epithelioid 



