63 

 GENITAL ORGANS : MALE. 



LABORATORY WORK FOR THE WEEK. 



References : 

 Points for Quiz : 



Laboratory Report : 



Due : 



Obtain from the delivery desk, (a) paraffin sections, 141, 143 ; 

 () collodion sections, 139,1 40, 144, (c) 142, cover-glass preparation. 



TESTICLE. 



139. Testis, . Longisection ; collodion; 

 sections ju. Stain with hematoxylin and picrofuchsin. 



The following parts should be recognized, (a) the testis, and 

 () the epididymis ; in the testis, the three coats, the lobules of the 

 testis, and, composing the lobules, the seminiferous tubules, straight 

 tubules and rete testis ; in the epididymis, note its relation (as a 

 mass) to the testis, the structure of the tubules, the character of the 

 epithelium. Does the section include the globus major or minor or 

 both ? Is the vas epididymis sectioned ? Can you determine the 

 vas deferens ? In addition, note the blood vessels. 



140. Testis, . Transection of the testis in the 

 tunica vaginalis. ; collodion ; sections //. Stain 

 with hematoxylin and eosin. 



Identify, as far as possible, the parts recognized in 139, and in 

 addition, the tunica vaginalis with its two layers, and the mediasti- 

 num. Note the position occupied by the blood vessels. What is 

 the cavity between the two layers of the tunica vaginalis and its 

 lining epithelium ? Identify the vas defefens. 



141. Spermatogenesis. Rat. Section of a part of the 

 testis. ; paraffin ; sections //. Stain with hema- 

 toxylin and acid fuchsin ( l /i% solution). 



Examine different tubules and find if possible five different stages 

 in the formation of the spermatozoa, remembering that the process 



