internal urethral sphincter

internal sphincter muscle of urethra

A urethral sphincter 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. It is kept tonically contracted by the sympathetic nervous system and during micturition, is relaxed via the parasympathetic nervous system. This is the primary muscle for preventing the release of urine[WP].

유형 Muscle
상위 구조물 urethral sphincter
라틴어 명칭 internal sphincter muscle of urethra
FMA ID 45769

자주 묻는 질문

What is the internal urethral sphincter?
A urethral sphincter 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. It is kept tonically contracted by the sympathetic nervous system and during mict
What is the Latin name for the internal urethral sphincter?
The Latin name for the internal urethral sphincter is internal sphincter muscle of urethra.

관련 구조물

mucus body coating mucous body coating mucus cocoon mucous cocoon Mullerian duct ductus paramesonephricus multi cell part structure cell part cluster multicellular anatomical structure multicellular structure multilaminar epithelium laminated epithelium multi-tissue structure multi-tissue structures multi-unit eye

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.