#bladder_sphincter__bladdersphincter__musculus_sphincter_vesicae  the sphincter muscle of the urinary bladder; made up of a thickened muscular layer of bladder around the urethral opening
  supertype:  #anatomical_sphincter__sphincter__sphinctermuscle  a ring of muscle that contracts to close an opening
  part of:  #urinary_bladder__urinarybladder  a membranous sac for temporary retention of urine
     part of:  #urogenital_system__urogenital_apparatus__urinary_system__urinarysystem__urinary_apparatus__urinaryapparatu__genitourinary_system__genitourinarysystem__genitourinary_apparatus__genitourinaryapparatu__systema_urogenitale__systemaurogenitale__apparatus_urogenitalis  the system that includes all organs involved in reproduction and in the formation and voidance of urine
     part of:  #urinary_tract__urinarytract  the organs and tubes involved in the production and excretion of urine
        part of:  #urogenital_system__urogenital_apparatus__urinary_system__urinarysystem__urinary_apparatus__urinaryapparatu__genitourinary_system__genitourinarysystem__genitourinary_apparatus__genitourinaryapparatu__systema_urogenitale__systemaurogenitale__apparatus_urogenitalis  the system that includes all organs involved in reproduction and in the formation and voidance of urine

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