There may be bacteria in or around the urethra but they normally cannot enter the bladder. A catheter can pick up bacteria from the urethra and allow them into the bladder, causing an infection to...
im not 100% sure but i think they're the same thingGenerally they are, but there is also a gall bladder.
There is a gall bladder and urinary bladder. In English, when people say "bladder," they mean urinary bladder.
The urine inside the urinary bladder is sterile.
This temporarily stores urine