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Urethra - Anatomy & Physiology (view source)
Revision as of 14:59, 2 September 2008
, 14:59, 2 September 2008no edit summary
** Penile portion - ischial arch to penile tip
** Penile portion - ischial arch to penile tip
** Note the first 2 combined are called the pelvic portion
** Note the first 2 combined are called the pelvic portion
====External Urethral Sphincter====
Unlike the internal sphincter the external sphincter is composed of striated muscle fibres which are under the voluntary control of the somatic nervous system. It is often called the '''urethralis''' muscle and runs the entire length of the urethra.
=====Somatic Motor Supply - External Urethral Sphincter=====
* S1-S2
* Pudendal Nerve
* No synapse
* Innervates the urethral skeletal muscle - external urethral sphincter
* Function is to retain urine
==Blood Supply==
==Blood Supply==
Blood Supply comes from the Urethral Artery
Blood Supply comes from the Urethral Artery