WAEC - Biology (2020 - No. 16)

The bladder functions as a reservoir and active excretory organ for the urine. Urine excreted by the kidneys passes through the ureters and the ureterovesical junction into the bladder. However, the urine collects in the renal pelvis, which drains into the ureter . Then, the urine moves into the ureter for storage in the urinary bladder. Thus, option D is the best answer.