Assertion: urethra's sphincter | /r/HasProperty | important
Facets:
value: in maintaining continence
type: PURPOSE
Source sentences:
text: In a study by J. E. McNeal (J. Urol., 107: 1008-1016, 1972) it was emphasized that (1) the prostatic lobes of the fetus do not persist in the adult; (2) the urethral glands, which form a central zone, are not really a part of the prostate; (3) the prostatic urethra comprises a superior portion distinguished by the urethral glands and a "preprostatic sphincter;" (4) "benign prostatic hypertrophy" is really benign peri-urethral hyperplasia, being confined to the central zone and superior portion of the prostatic urethra; (5) the preprostatic sphincter is important in maintaining continence; and (6) the peripheral zone is the site of carcinoma.