The female urethra:
A) is more difficult to catheterize than the male urethra.
B) opens into the vestibule of the vagina.
C) has cilia that very effectively prevent bacteria from entering the bladder.
D) begins with a distinct sphincter in the bladder, the internal urethral sphincter.
E) has a distinct posterior ridge termed the urethral crest.
Ans: B
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