THE KIDNEYS 



1349 



the impressio muscularis. A little internal to this a flattening, caused by the Psoas 

 muscle, is often recognizable. 



ELEVENTH RIB 



TWELFTH RIB 



TRANSVERSE PROCESSES 

 OF FIRST LUMBAR VERTEBRA 



TWELFTH RIB 



TRANSVERS 



VERTEB 



FIG. 1091. The posterior surfaces of the kidneys, showing areas of relation to the parietes. 



POSTERIOR 



LAMELLA OF 



PERIRENAL' 



FASCIA 



_ , 



SACROLUMBALIS BOHUM MUSCLE 



PARARENAL 



'AT BEHIND 



PERIRENAL 



FASCIA 



ANTERIOR 

 LAMELLA Of 

 PERIRENAL 

 FASCIA 



PERITONEUM 

 TRUE 



PERIRENAL 

 FAT 



FIG. 1092. Longitudinal section, showing the 

 arrangement of the capsule of the kidney. 

 (After Gerota.) 



FIG. 1093. Transverse section, showing the relations 

 of the capsule of the kidney and the two layers of fat. 

 (After Gerota.) 



Borders. The external border (margo lateralis) (Figs. 1088 and 1089) is convex, 

 and is directed outward and backward, toward the postero-lateral wall of the 



