Assertion: ureter's structure | /r/CapableOf | help keep urine
Facets:
value: in the bladder
type: LOCATION
Source sentences:
text: held closed by the urethral sphincter, a muscular structure that helps keep urine in the bladder until voiding can occur.
text: The urethra is held closed by the urethral sphincter, a muscular structure that helps keep urine in the bladder until voiding can occur.