What does the ureter do?

The correct answer reflects the primary function of the ureter, which is to carry urine from the kidneys to the bladder. Each kidney produces urine, which then travels through the ureters, a pair of muscular tubes, utilizing peristaltic movements to push the urine downward into the bladder for storage. This process is crucial for the urinary system, as it ensures that urine is efficiently transported and collected before being excreted from the body.

Understanding this function highlights the importance of the ureters in the urinary system's overall efficiency and health. The ureters do not perform roles related to blood flow regulation or filtration of blood; those functions are designated to different structures, such as the renal artery and the nephron, respectively. Additionally, urine storage is the primary role of the bladder, making the distinction between these structures and their functions important in comprehending the entirety of renal and urinary physiology.