ANATOMY

Detailed explanation-1: -Two of the openings are from the ureters and form the base of the trigone . Small flaps of mucosa cover these openings and act as valves that allow urine to enter the bladder but prevent it from backing up from the bladder into the ureters. The third opening, at the apex of the trigone, is the opening into the urethra.

Detailed explanation-2: -The fundus of the bladder contains three openings which form the trigone of the bladder; the internal urethral orifice and the two ureteric orifices.

Detailed explanation-3: -Your kidneys clean your blood and produce urine, a waste product. From your two kidneys, two ureters move the urine to the bladder, where it’s stored until you urinate (pee). Urine leaves your body through a hole at the end of your urethra. That hole from the inside to the outside is called the urethral meatus.

Detailed explanation-4: -The apex is the anterosuperior part of the bladder that points towards the abdominal wall. The fundus, or base, is the posteroinferior part of the bladder. The body is the large area situated between the apex and the fundus.

Detailed explanation-5: -Before reaching the urethral opening, urine passes through the urethral sphincter. This is a muscular structure in the urethra that helps hold urine inside the body until it’s released. The urethra opens into the vestibule, the area between the labia minora.