ANATOMY OF THE KIDNEY. 



kidney of the horse, ox, or sheep (Fig. 1 51), that it consists of 

 an external red cortical portion, and of a lighter coloured in- 

 ternaJ medullary portion. This medullary portion appears 

 to be composed of a number of conical bodies, the bases of 

 which are towards the cortical portion of the kidney, whereas 



Fig. 152. (KbLLiKER.) Malpig-' 

 hian body, and tube of Ferrein. a, 

 Epithelial cells, lining theMalpighian 

 body; b, Basement membrane of tu- 

 bercle; c, d, Epithelial cells lining the 



tubercle, e, Detached cells; /, Artery; M * 153 



y ein hian body, etc., from the Horse, a, 



Arterial branch ; af, Afferent vessel ; 

 m, Malpighian tuft ; ef, Efferent ves- 

 sel ; b, Its branches entering the me- 

 dullary cone. X 70. 



the apices converge towards a cavity called the pelvis of the 

 kidney, which is the commencement of the ureter. Examin- 

 ing into the minute structure of the kidneys, we find it to 

 consist of an immense collection of tubes lined by epithelium. 

 (Fig. 152.) In the medullary portion the tubes are straight 



