COXXECTIOXS OF THE BLADDEK. 



421 



the umbilicus, where itbecomeshlendedwiththe dense fibrous tissue fonnd 

 in tliat situation. The urachus, which forms in the early foetal state a 

 tubular communication between the urinary bladder and the allantoic 

 vesicle, preserves, according- to Luschka, vestiges of its original condi- 

 tion in the form of a long interrupted cavitj-, with irregularities and 

 dilatations, lined with epithelium similar to that of the bladder, and 

 sometimes communicating by a fine opening with the vesical cavity.* 



The sides of the bladder, when it is distended, are rounded and pro- 

 minent, and are each of them crossed obliquely by the cord of the 

 obliterated hypogastric artery, which is connected posteriorly with the 

 superior vesical artery, and runs forwards and upwards to the um- 

 bilicus, approaching the urachus above the summit of the bladder. 

 Behind and above this cord the side of the bladder is covered with the 

 peritoneum, but below and in front of il the peritoneum does not reach 

 the bladder, which is here connected to the sides of the pelvic cavity 

 by loose areolar tissue containing fat, and, near its anterior and lower 

 part, by the broad expansion from the recto-vesical fascia, formings 

 the lateral true, liijament. The vas deferens crosses obliquely the lower 

 part of this lateral surface, from before backvrards and downwards, and 

 turning over the obliterated hypogastric artery, descends upon the inner 

 fiide of the ureter, along the posterior surface, to the base of the bladder. 



The lase or fundus (fig. 305) (inferior fundus) is the widest part of 

 the bladder. It is directed backwards as well as downwards, and differs 

 according to the sex in its relations to other parts. In the male it rests 



Fig. 305. — IJASE OF THE jMale 

 Bladdek with the Vesicul.e 

 Seminales, Vasa Defeuentia, 

 AND Prostate exposed (from 

 Haller). One-ualf the natur- 

 al SIZE. 



a, line of reflection of the peri- 

 toneimi in the recto-vesical pouch ; 

 h, the part above this from which 

 the peritoneum has licen removed, 

 exposing the longitudinal mus- 

 cular fibres ; /, left vas deferens 

 ending in e, the left ejaculatory 

 duct ; .?, left vesicula seminalis 

 joining the same duct ; the right 

 vas deferens, and the right vesi- 

 cula seminalis, marked s, s, un- 

 ravelled, are also showii ; p, 

 under side of the prostate gland ; 

 III, small part of the membranous 

 jjortion of the urethra ; u, a, the 

 ureters, of whicli the right is 

 turned to the side . 



upon the second portion of 

 the rectum, and is covered 

 posteriorly for a short space 

 by the peritoneum, which, 

 thence • upon the rectum, so 

 SO-i, r). In front of the line 



Fill 



^<s^\Twnm^*, 



however, is immediately reflected fi-om 

 as to form the redo-vesical jjouch (fig. 

 of reflection of .the serous membrane, the 



\'irchow"s Arcliiv, 1S62, and Anat. d. Mensch., vol. ii. p. 229. 



