What are the ureters?

What are the ureters?

Ureters are long, narrow tubes that drain urine from your kidneys to your bladder. Normally one ureter leads from each kidney to your bladder. In the case of duplicated systems, two ureters drain a single kidney. One ureter drains the upper pole of your kidney and the other drains the lower pole. This condition may affect one or both kidneys.