In which of the following is urine stored in the human body?

Urine is stored in the bladder, which is a muscular sac located in the pelvis. The bladder serves as a temporary reservoir for urine, allowing it to accumulate until the body is ready to eliminate it. The walls of the bladder can stretch to accommodate varying volumes of urine, and its controlled muscular contractions facilitate urination when the time is appropriate.

In contrast, the kidneys are responsible for the production of urine through the filtration of blood and the removal of waste products. The ureters are tubes that transport urine from the kidneys to the bladder, while the prostate is a gland that is part of the male reproductive system and does not have a role in urine storage. The distinction in function between these structures highlights the bladder's unique role in storing urine before it is expelled from the body.