how do the kidneys and bladder work together
From there, urine travels out of the kidneys through the ureters to be stored in the bladder (a muscular sac in the lower abdomen). The bladder expands as it fills and can hold about 2 cups (half a liter) of urine at any given time (the average adult produces about 6 cups, or 1Â½ liters, of pee per day).