IMPREGNATION OF THE OVUM. 



731 



CORPUS LUTEUM OF MEN- 

 STRUATION. 



COEPUS LUTEUM OF PHEG- 



NANCY. 



At the end of 



three weeks 

 One month 



Two months 



Six montJis 



Nine months 



Three-quarters of an incli in diameter ; central clot 



reddish ; convoluted wall pale. 

 Smaller ; convoluted Larger 



wall bright yellow 



clot still reddish. 



insignificant 



Keduced to the condition 

 of an 

 cicatrix. 



Absent. 



Absent. 



convoluted wall 

 bright yellow ; clot still 

 reddish. 



Seven-eighths of an inch in 

 diameter ; convoluted wall 

 bright yellow ; clot per- 

 fectly decolorised. 



Still as large as at end of 

 second month ; clot fibri- 

 nous ; convoluted* wall 

 paler. 



One-half an inch in diame- 

 ter ; central clot converted 

 into a radiating cicatrix ; 

 the external wall tolerabl} r 

 thick and convoluted, but 

 without any bright yellow 

 colour. 



IMPREGNATION OF THE OVTIM. 



Male Sexual Functions. 



The fluid of the male, by which the ovum is impregnated, 

 consists essentially of the semen secreted by the testicles - r 

 and to this are added, as necessary, perhaps, to its per- 

 fection, a material secreted by the vesiculee seminales, in 

 which, as in reservoirs, the semen lies before its discharge, 

 as well as the secretion of the prostate gland, and of 

 Cowper's glands. Portions of these several fluids are, 

 probably, all discharged, together with the proper secretion 

 of the testicles. 



The secreting structure of the testicle is disposed in two- 

 contiguous parts, (T) the body of the testicle enclosed within 

 a tough fibrous membrane, the tunica albuyinea, on the 

 outer surface of which is the serous covering formed by 

 the tunica vaginalis, and (2) the epididymis. The vas deferens, 



