Ureter
The Urinary Bladder is located true Pelvis. This is the part of the pelvis thay is smaller and between Ischial and Pubis bones of each side (ie not the between the Illium bones). It lied at the Posterion of this area.
No, the urinary bladder adn gallbladder are two different things.
Urinary Bladder
The trigone is between the three orifices of the urinary bladder.
the urinary bladder
hypogastric
urinary bladder
The bladder.
The bladder holds the urine 
The urethra.
they can be located anywhere in the urinary tract, from the bladder or kidneys all the way to the opening.
The urinary system includes the kidneys, urethra, bladder.