Where is the trigone located?

• A. At the base of the bladder
• B. At the apex of the bladder
• C. In the bladder neck
• D. In the bladder body

Answer: (A)

The trigone is a triangular patch on the interior floor of the bladder, bounded by the openings of the two ureters and the internal urethral orifice. This region sits at the base (the bladder floor) of the organ, with its apex directed toward the bladder neck. It is located there, not at the apex of the bladder, the bladder neck, or the bladder body. So the trigone is located at the base of the bladder.