A text-book of clinical anatomy : for students and practitioners . dder maybe elevated just behind the urethral orifice and cause the musculatureto be greatly hypertrophied, the mucous membrane often bulgingbetween the trabecular, or ridges formed by the hypertrophied diverticula may be punctured through the careless use of instru-ments in the aged. At the base of the bladder a pouch forms behind thehypertrophied prostate in which a portion of the urine lies and cannotbe expelled. This urine which is left behind at each urination is calledresidual urine, and it readily decomposes,
A text-book of clinical anatomy : for students and practitioners . dder maybe elevated just behind the urethral orifice and cause the musculatureto be greatly hypertrophied, the mucous membrane often bulgingbetween the trabecular, or ridges formed by the hypertrophied diverticula may be punctured through the careless use of instru-ments in the aged. At the base of the bladder a pouch forms behind thehypertrophied prostate in which a portion of the urine lies and cannotbe expelled. This urine which is left behind at each urination is calledresidual urine, and it readily decomposes, giving rise to an inflam-mation of the bladder, or cystitis. All forms of cystitis may, throughmigration of the organisms along the ureters into the pelvis of thekidney, give rise to a condition known as pyelonephritis, formerlycalled surgical kidney, the effect upon the system being that of anacute or chronic toxemia, called urosepsis. The seminal vesicles and vasa deferentia are covered by peri-toneum close to the entrance of the ureters into the bladder. Thev. Fig. 96.—Dissection of base of male bladder. B, Bladder. D, Vas deferens. U,Ureters. Upon the right side the ureter is seen to disappear obliquely through the coats ofthe bladder, a little above the upper end of the seminal vesicles (SV). Upon the left sideits entrance through the bladder-wall is concealed by the upper end of the seminal , Seminal vesicle. P, Prostate gland, showing lateral lobes. M, Membranous portionof urethra. T, Anterior layer of triangular ligament. I, Ascending ramus of ischium anddescending ramus of pubes. 311 RELATIONS OF PELVIC VISCERA. 313 converge toward the median line and their ducts enter the prostaticportion of the urethra on either side of the median line, so that in re-moval of the prostate an injury of the ducts is almost unavoidable. Around the neck of the bladder there is a rich plexus of veins knownas the prostatic plexus, which frequently become so congested as tobecom
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