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Urinary Bladder - Anatomy & Physiology (view source)
Revision as of 10:42, 10 July 2008
, 10:42, 10 July 2008no edit summary
** Here they merge
** Here they merge
** Forms the urethral crest - continues into the urethra
** Forms the urethral crest - continues into the urethra
===Muscles of the Bladder===
The three muscular components of the bladder described below play a pivotal part in the [[Process of Micturition | micturition reflex.]]
=====Detrusor Muscle=====
Network of smooth muscle fibres within the bladder wall which are supplied by both parasympathetic and sympathetic nerves.
=====Internal Urethral Sphincter=====
Its a thickening of the bladder musculature which is continous with the detrusor and therefore is smooth muscle. However unlike the detrusor its innervation is purely from sympathetic fibres.
=====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
==The Ligaments of the Bladder==
==The Ligaments of the Bladder==