388 



MANUAL OF PHYSIOLOGY. 



STRUCTURE OF THE KIDNEYS. 



The kidneys may be called complex tubular glands, because the 

 tubes of which they are composed are made up of a number of 



FIG. 171. 



FIG. 172. 



FIG. 171. Diagram of the Tubules of the Kidney. (Gadiat.) a. Large 

 duct opening at papilla. 6 and c. Straight collecting tubes, d and e. Looped 

 tubule of Ilenle. /. Convoluted tubules of cortex, g. Capsule from which 

 the latter spring. 



FIG. 172. Portions of various Tubules highly magnified, showing the 

 relation of the lining epithelium to the wall of the tube. (Cadiat. ) a. Large 

 duct near the papilla, b. Commencement of Henle's loop. c. Thin part of 

 Henle's loop. 



