How many openings does the bladder have?

The bladder has three openings: one for the urethra and two for the ureters. The ureters are the tubes that carry urine from the kidneys to the bladder, and they each have an opening into the bladder that allows urine to flow in. The opening for the urethra allows urine to exit the bladder. This structure is important for the proper functioning of the urinary system, as it ensures that urine can be stored and then expelled from the body effectively. The design with three openings also helps maintain bladder pressure and prevents backflow of urine into the ureters.