Ureter

The ureter is a urinary system channel.

Function of the ureter

The ureter transports urine from the kidneys (where it is produced) to the bladder (where it is stored until micturition). Urine is not transferred passively but is helped by peristatic movements of the muscle walls of the ureter.

Structure of the ureter

The ureter is a 25 to 35 centimetres long channel. There are two ureters (each connected to a kidney and to the bladder). The lumen of the ureter is star shaped. It varies from 15 millimetres to 1 centimetre in diameter.