sphincter vesicae


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Related to sphincter vesicae: Detrusor muscle

in·ter·nal u·re·thral sphinc·ter

[TA]
the complete collar of smooth muscle cells of the neck of the urinary bladder that extends distally to surround the preprostatic portion of the male urethra. There is no comparable structure in the neck of the female bladder; the internal urethral sphincter may exist to prevent reflux of semen into the bladder.

sphinc·ter ve·si·cae

(sfingk'tĕr vĕ-sī'sē)
The complete collar of smooth muscle cells of the neck of the urinary bladder that extends distally to surround the preprostatic portion of the male urethra. There is no comparable structure in the neck of the female bladder; the internal urethral sphincter may exist to prevent reflux of semen into the bladder.
Synonym(s): musculus sphincter vesicae [TA] .