Z8600021: /* Primitive Kidney and Bladder */

2013-05-13T08:39:17Z

Primitive Kidney and Bladder

← Older revision		Revision as of 19:39, 13 Mayıs 2013
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	==Primitive Kidney and Bladder==		==Primitive Kidney and Bladder==
			From a reconstruction (After Schreiner.)

	~~from a reconstruction (After Schreiner.)~~

	~~{{Historic Disclaimer}}~~
	===The Urinary Bladder===		===The Urinary Bladder===

	* bladder is formed partly from the entodermal cloaca and partly from the ends of the Wolffian ducts		* bladder is formed partly from the entodermal cloaca and partly from the ends of the Wolffian (mesonephric) ducts
	* allantois takes no share in its formation		* allantois takes no share in its formation
	* after the separation of the rectum from the dorsal part of the cloaca the ventral part becomes subdivided into three portions		* after the separation of the rectum from the dorsal part of the cloaca the ventral part becomes subdivided into three portions
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	* the second and third parts together constitute the urogenital sinus		* the second and third parts together constitute the urogenital sinus
	* the vesico-urethral portion absorbs the ends of the Wolffian ducts and the associated ends of the renal diverticula		* the vesico-urethral portion absorbs the ends of the Wolffian (mesonephric) ducts and the associated ends of the renal diverticula
	* these give rise to the trigone of the bladder and part of the prostatic urethra		* these give rise to the trigone of the bladder and part of the prostatic urethra
	* the remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra		* the remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra

S8600021: ==Primitive Kidney and Bladder== from a reconstruction (After Schreiner.) {{Historic Disclaimer}} ===The Urinary Bladder=== * bladder is formed partly from the entodermal cloaca and partly from the ends of the Wolffian ducts * allantois takes no share

2011-05-27T22:21:15Z

New page

==Primitive Kidney and Bladder==

from a reconstruction (After Schreiner.)

{{Historic Disclaimer}}
===The Urinary Bladder===

* bladder is formed partly from the entodermal cloaca and partly from the ends of the Wolffian ducts
* allantois takes no share in its formation
* after the separation of the rectum from the dorsal part of the cloaca the ventral part becomes subdivided into three portions
# an anterior vesico-urethral portion, continuous with the allantois - into this portion the Wolffian ducts open
# an intermediate narrow channel, the pelvic portion
# a posterior phallic portion, closed externally by the urogenital membrane

* the second and third parts together constitute the urogenital sinus
* the vesico-urethral portion absorbs the ends of the Wolffian ducts and the associated ends of the renal diverticula
* these give rise to the trigone of the bladder and part of the prostatic urethra
* the remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra
** its apex is prolonged to the umbilicus as a narrow canal
** later is obliterated and becomes the medial umbilical ligament (urachus)

(text modified from Gray's Anatomy)

{{Gray Anatomy}}

[[Category:Human]] [[Category:Genital]] [[Category:Renal]]

File:Gray1118.jpg - Revision history

Z8600021: /* Primitive Kidney and Bladder */

S8600021: ==Primitive Kidney and Bladder== from a reconstruction (After Schreiner.) {{Historic Disclaimer}} ===The Urinary Bladder=== * bladder is formed partly from the entodermal cloaca and partly from the ends of the Wolffian ducts * allantois takes no share