Final answer:
Urine is stored in the urinary bladder after being transported from the kidneys through the ureters.
Step-by-step explanation:
The organ responsible for storing urine in the human body is the urinary bladder. After the kidneys filter blood and form urine, it is transported through the ureters to the bladder. The bladder collects and holds the urine until the body is ready to excrete it during urination. When it's time to urinate, the bladder releases urine into the urethra, which then carries the urine out of the body.