386 



STUDIES IN ADVANCED PHYSIOLOGY. 



In its gross structure a kidney shows a connective tissue 

 covering called the capsule. The kidney itself shows two 



Ua, 



Fig. 127. THE URINARY ORGANS FROM BEHIND. (Henle.) 



A, aorta; Vc, venacava; Ar, renal artery; Vr, renal vein ; R, right kidney; U, ureter; 

 Vu, bladder; Ua, urethra. 



well marked areas, an outer one, reddish in appearance in 

 a fresh specimen, and somewhat granular, called the cor- 



