Which statement best describes the ureters?

• A. Muscular sacs for urine storage in kidneys
• B. Tubes that connect kidney to bladder
• C. Spherical structures that filter blood
• D. Muscles that control urine release from urethra

Answer: (B)

Ureters are the muscular tubes that move urine from the kidneys to the bladder using rhythmic smooth-muscle contractions (peristalsis). They run from the renal pelvis down to the bladder and enter the bladder wall to deposit urine, which is why they’re described as connecting the kidney to the bladder. This transport role is why this statement is the best fit. They aren’t storage structures—that happens in the bladder. They don’t filter blood—that's done by the kidneys’ nephrons and glomeruli. They don’t control urine release through the urethra—that function belongs to the urethral sphincters and pelvic floor.