XIV. 



THE KIDNEYS. 

 A. The Kidney of a Sheep. 



Material. A kidney of a sheep. This may be obtained at any 

 market. 



Cut away most of the fat surrounding the kidney and 

 any other tissues that may be attached, but leave the ureter 

 and blood-vessels untouched. 



I. THE EXTERNAL PARTS. 



Notice : 



a. The shape of the kidney. 



b. The size. 



c. The tube or ureter leading from the kidney. 



d. The blood-vessels. 



e. The fat. What is its use ? 

 /. The thin skin on the outside. 



g. The hilus, or deep fissure on the inner border. Where 

 does it lead ? 

 h. Sketch. 



II. THE INTERNAL PARTS. 



Cut the kidney in halves longitudinally, making the 

 cut through the hilum and parallel to the broad side of 

 the kidney. 



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