Internal_sphincter_muscle_of_urethra, Internal_sphincter_muscle_of_urethra Information, Internal_sphincter_muscle_of


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Internal sphincter muscle of urethra

Coronal section of anterior part of pelvis, through the pubic arch. Seen from in front. (Region visible, but muscle not labeled.)

Urinary bladder (Region visible, but muscle not labeled.)
Latin	musculus sphincter urethrae internus
Origin:	Pubis ramus
Insertion:	Median raphe
Artery:
Nerve:	Pudendal nerve
Action:
Dorlands/Elsevier	m_22/13540450

The internal sphincter muscle of urethra is a muscle which constricts the internal urethral orifice. It is the junction of the urethra with the urinary bladder. The muscle is made of smooth muscle, so therefore it is under involuntary control. This is the primary muscle for constricting the release of urine.

This anatomy article is a stub. You can help Wikipedia by expanding it.

v • d • e

Anatomy: urinary system

Abdomen

Kidneys • Ureters • Orifice of ureter

Pelvis

Urinary bladder (Uvula, Trigone, Detrusor, Apex, Neck)

Urethral sphincters (External sphincter muscle of male urethra, External sphincter muscle of female urethra, Internal sphincter muscle of urethra)

Urethra

Development

Development of the urinary and reproductive organs

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia