STRUCTURE OF THE PENIS. 415 



Its surface is studded throughout with the apertures of minute glands. 

 glands, which are lodged in the submucous tissue, and the ducts of 

 which are inclined obliquely forwards. 



Submucous tissue. Beneath the mucous lining of the urethra is Submucous 

 a stratum of longitudinal unstriated muscular fibres, mixed with tlssue : 

 elastic and fibrous tissues. It is continuous behind with the sub- 

 mucous fibres of the bladder, and is joined in the prostate by the nature; 

 muscular fibres accompanying the common seminal ducts. The 

 stratum differs at spots : it is most developed in the prostate ; in arrangement 

 the membranous portion the muscular structure is less abundant ; in liretnra - 

 and in the spongy part fibrous tissue forms most of the submucous 

 laer. 



Around the membranous and prostatic divisions of the urethra Erectile 

 there is, in addition, immediately beneath the mucous membrane, a throughout 

 thin layer of vascular or erectile tissue, which is continued back- 

 wards from the corpus spongiosum to the neck of the bladder. 



STRUCTURE OF THE PENIS. The form and the relations of the Penis 

 penis having been described (pp. 251 et seq.) the bodies of which it is twTvalcuiar 



composed remain to be noticed. If a section is made along one 

 side of the penis, it will show this organ to be composed of two 

 masses of spongy and vascular tissue (corpora cavernosa) encased 

 in a fibrous covering, with an imperfect septum between them, and 

 having the corpus spongiosum attached along their under surface. 



CORPORA CAVERNOSA (fig. 154, r). These bodies form the bulk Corpora 

 of the penis, and are two dense cylindrical tubes of fibrous tissue, attached 3 

 containing erectile structure. Each is fixed behind by a pointed ^J hind tel 

 process, crus penis, to the conjoined rami of the ischium and pubis blend 

 for about an inch, and blends with its fellow in the body of the [n g ft-ont r - 

 penis, about an inch and a half from its posterior extremity. There 

 is a slight swelling on the crus, called the bulb of the corpus caver- bulb. 

 nosum (Kobelt). 



Each corpus cavernosum is composed of a fibrous case containing structure : 

 a cavernous or trabecular structure, with blood-spaces between the 

 trabeculse of the spongy mass. An incomplete median septum 

 exists along the body of the penis. 



The fibrous case is a white, strong, elastic covering which, along a case 

 the middle of the penis, sends inwards a septal process between the that sends 

 two corpora cavernosa as well as numerous other finer threads, m P r C( 

 which are connected with the trabeculae of the spongy structure, 

 of which the corpus cavernosum is composed. 



It is formed of white shining fibres which are disposed in two fibres form 

 layers, outer and inner. The outer stratum is formed of longi- s 

 tudinal fibres with close meshes. The inner stratum consists of 

 circular fibres, with a like plexiform disposition ; and the circular 

 fibres of each cavernous body meeting in the middle line give rise 

 to the septum penis. Both strata are inseparably united by 

 communicating bundles. 



The septal process (fig. 155) is placed vertically along the body a septal 

 of the penis, and is thicker and more perfect behind than in front. piece> 

 Near the junction of the crura this partition divides the enclosed 



