Urine leaves the body through a sphincter in the process of urination.
From the bladder, urine leaves the body.
The bladder empties through a sphincter in the process of urination.
Urine has to pass through what as the bladder empties?
  epidermal
  body water
  a sphincter
  all liquids
  mouth of rivers
  alveoli
  salt and water.
  aqueous solution