What is the passage of urine from the body to bladder?

The passage of urine from the body to the bladder occurs through the ureters, which are two tubes that carry urine from the kidneys. Once urine is produced in the kidneys, it travels down these ureters and enters the bladder, where it is stored until it is expelled from the body through the urethra during urination. The bladder's muscular walls contract to release urine when appropriate.