6o 

 THE URINARY ORGANS. 



LABORATORY WORK FOR THE WEEK. 



References : 

 Points for Quiz : 

 Laboratory Report : 



Due . 



Obtain from the delivery desk (a) paraflSn sections 129, 132, 

 i33> i.H) collodion sections 130, 134, 135, 136, 137, 138. 



KIDNEY. 



129. Kidney. Transection. Miiller's fluid ; par- 

 aflBn ; sections jx. Stain with hematoxylin and eosin. 



Examine the gross preparations of kidney for (a) the form and 

 color of the organ, (5) the unilobular (apparently) and multilobular 

 kidney ; compare the kidney of the child with that of the adult, 

 and with the kidney of the ox. In the transected and longisected 

 organs, recognize if possible (a) the cortex (superficial zone) and 

 (^) medulla, {c) the papillae. Some of the kidneys have one, others 

 several papillae ; note in which animals each of these conditions oc- 

 curs and correlate lobules and papillae. 



In studying the section recognize the following regions : (a) 

 cortex and {b) medulla ; in the cortex, medullary rays and laby- 

 rinth, and in the medulla, the pyramids and the columns of Bertini. 

 Study carefully these four regions, identifying the structures that 

 should be present in each. Understand the course the uriniferous 

 tubule would pursue from its beginning (Bowman's capsule) to the 

 opening of the collecting tubule into the pelvis of the kidney and 

 the regions in which its successive parts are found. Again examine 

 the longisected kidneys ; recognize the regions and note the struct- 

 ural appearance of each, for which you have the explanation in this 

 preparation. 



130. Injected kidney. Cat. Transection.. Blood vessels 

 injected with carmine gelatin mass ; collodion ; sections fx. 



