Which organ stores urine until urination?

Which organ stores urine until urination?

• A. Kidney
• B. Bladder
• C. Ureter
• D. Urethra

Answer: (B)

The urine produced by the kidneys is stored in a expandable sac called the urinary bladder. As urine flows down from the kidneys through the ureters, it collects in the bladder, which can stretch to accommodate increasing volume. When the bladder fills to a comfortable limit, stretch receptors trigger a reflex that signals the bladder to contract and the sphincters to relax, allowing urination to occur. The bladder’s role as a storage reservoir is what makes it the correct answer, distinct from the kidneys (urine formation), the ureters (tubes that deliver urine to the bladder), and the urethra (the exit outlet).

The urine produced by the kidneys is stored in a expandable sac called the urinary bladder. As urine flows down from the kidneys through the ureters, it collects in the bladder, which can stretch to accommodate increasing volume. When the bladder fills to a comfortable limit, stretch receptors trigger a reflex that signals the bladder to contract and the sphincters to relax, allowing urination to occur. The bladder’s role as a storage reservoir is what makes it the correct answer, distinct from the kidneys (urine formation), the ureters (tubes that deliver urine to the bladder), and the urethra (the exit outlet).