5 8 



ABDOMEN 



number of processes like the teeth of a comb. Fibrous 

 lamellae and bands proceed from the deep surface of the 

 sheath and join together to form a spongy framework. The 

 interstices of this framework communicate freely with each 

 other and are filled with venous blood. By squeezing the 

 corpus cavernosum under the tap and washing out the blood 

 some idea of the trabeculae may be obtained. 



The corpus cavernosum urethrae has a similar structure. 

 The enclosing sheath, however, is very delicate, and the 

 trabeculse are much finer. 



Fibrous capsule of the Prepuce 

 corpus cavernosum 



Glans penis 



Fossa navicularis 



Corpus 



cavernosum 



penis 



Offsets from __ 

 capsule " 



Prepuce 



Glans penis 

 .cuna magna 



Urethra 



Co:pus cavernosum urethras 



FIG. 228. Medial section through terminal part of the Penis : 

 Prepuce extremely short. 



Dissection. Divide the peritoneum along the junction of the superior 

 surface with the fundus of the bladder, and extend the incision to the 

 lateral wall of the pelvis to separate each lateral false ligament from the 

 peritoneum posterior to it. Next divide the peritoneum in the medial 

 plane on the superior surface of the bladder and then divide the superior 

 and posterior walls of the viscus in the median plane. After the division 

 is completed dissect the fundus of the bladder from the deferent ducts 

 and the seminal vesicles, taking care not to injure the ureters as they 

 enter the bladder wall. When the separation is completed note the 

 relations of the bladder and ureters to the more posterior structures. 



In the median plane there may be a slight interval be- 

 tween the deferent ducts in which the rectum is separated 

 from the bladder wall merely by the recto-vesical fascia ; this 

 interval, if it is present, corresponds to the middle and back 

 part of the trigone of the bladder. On each side of it the 

 deferent duct and the seminal vesicle separate the bladder 



