Difference between revisions of "Urethra - Anatomy & Physiology"

Revision as of 09:45, 11 August 2008

()Map URINARY SYSTEM (Map)

This is the connection between the bladder and the external environment.

Female

Empties at the external urethral orifice
Ventral wall of vagina
At the vestibulo vaginal junction
Only urine passes through it
Length and diameter is species specific
- Short and wide - mare
- 2 fossa - bitch
- Sub urethral diverticulum - cow and sow

Male

Empties at tip of penis
Divided into 3 parts
- Pre-prostatic - bladder neck to seminal hillock
- Prostatic portion - openings of deferant, vesicular and prostatic ducts
- Penile portion - ischial arch to penile tip
- Note the first 2 combined are called the pelvic portion

Blood Supply

Blood Supply comes from the Urethral Artery

@@ Line 1: / Line 1: @@
+{{toplink
-==Introduction==
+|backcolour = C1F0F6
+|linkpage =Urinary System - Anatomy & Physiology
-This muscular tube is the connection between the bladder and the external environment and plays a vital role in concious urinary continence.
+|linktext =URINARY SYSTEM
+|maplink = Urinary System (Content Map) - Anatomy & Physiology
-==The Layers of the Urethra==
+|pagetype =Anatomy
+}}
-The layers of the walls of the urethra are largely similar to those of the [[Urinary Bladder - Anatomy & Physiology#Anatomy|urinary bladder]] apart from one significant difference; in both the male and the female the urethral submucosa has a network of veins which may contribute to continence by forming a kind of erectile tissue.
+<br>
+This is the connection between the bladder and the external environment.
 ==Female==
-* Empties at the external urethral orifice on the ventral wall of the vagina
+* Empties at the external urethral orifice
-* This is often at the vestibulo vaginal junction
+* Ventral wall of vagina
+* At the vestibulo vaginal junction
 * Only urine passes through it
 * Length and diameter is species specific
 ** Short and wide - mare
 ** 2 fossa - bitch
-** Suburethral diverticulum - cow and sow
+** Sub urethral diverticulum - cow and sow
 ==Male==
-[[Image:maleluttri.jpg|right|thumb|250px|<small><center>A schematic overview of the path of the male urethra</center></small>]]
-[[Image:sumbsbladurtri.jpg|right|thumb|250px|<small><center>A schematic overview of the blood supply to the bladder and urethra</center></small>]]
 * Empties at tip of penis
 * Divided into 3 parts
@@ Line 27: / Line 28: @@
 ** Penile portion - ischial arch to penile tip
 ** Note the first 2 combined are called the pelvic portion
-==Muscles of the Urethra==
-The '''urethralis''' muscle runs the entire length of the urethra and forms the external urethral sphincter.
-Unlike the [[Urinary Bladder - Anatomy & Physiology#Internal Urethral Sphincter|internal sphincter]] the external sphincter is composed of striated muscle fibres which are under the voluntary control of the somatic nervous system.
-=====Somatic Motor Supply - External Urethral Sphincter=====
-* S1-S2
-* Pudendal Nerve
-* No synapse
-* Innervates the urethral skeletal muscle - external urethral sphincter
-* Function is to contract and retain urine
 ==Blood Supply==
-Blood Supply comes from the Urethral Artery which is a branch of the vaginal artery which in turn is a branch of the internal pudendal which is a branch of the internal iliac.
+Blood Supply comes from the Urethral Artery
-==Revision==
-{{Template:Learning
-|flashcards = Use the [[Urethra - Anatomy & Physiology - Renal Flash Cards - Anatomy & Physiology|flash card revision resource]] for this section to test yourself.
-|dragster = [[Canine Urinary Radiographical Anatomy Resources (I & II)|Canine Male Urethrogram Radiographic Anatomy (II)]]
-}}
-==Webinars==
-<rss max="10" highlight="none">https://www.thewebinarvet.com/urogenital-and-reproduction/webinars/feed</rss>
-[[Category:Lower Urinary Tract - Anatomy & Physiology]][[Category:Bullet Points]]

Difference between revisions of "Urethra - Anatomy & Physiology"

Revision as of 09:45, 11 August 2008

Female

Male

Blood Supply

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