The ureter is the conduit that allows the passage of urine from the kidneys to the urinary bladder . The ureter is a muscle-mucous duct, it begins in the abdomen and ends in the urinary bladder, the ureter can be divided into two portions, one abdominal and the other pelvic.
What are ureters?
The ureters are the channels that allow urine to circulate from the kidneys to the urinary bladder.
The two ureters are located vertically on the sides of the spine. They have a diameter of about one centimeter, and a length that varies from 25 to 30 centimeters. The ureters inside them are lined with a mucous wall that comes into contact with the urine. The wall is wrapped in a muscular tunic. By contracting, the muscle tunic causes the elimination of urine in the bladder . In its lower part, each of the ureters includes a valve that allows urine to pass through the bladder, but not to reverse it. The valve therefore prevents the ascent of the urine towards the kidneys, but allows its outlet in the posterior wall of the bladder.
The human body is genetically programmed to have only one ureter for each kidney . About 0.8% of the population has a congenital malformation called ureteral duplicity , which causes the presence of two ureters for each kidney. It is a malformation that does not give rise to any health disturbance and does not cause any effect on a functional level.
Among the diseases related ureter include those involving the ureteral wall (including inflammation and malformations), as well as stones and tumors . Diseases of nearby organs, such as tumors or sclerosis , can also involve the ureter and cause consequences on its state of health (for example by compressing it).
What are they for?
The ureters are responsible for transporting urine from the renal pelvis to the urinary tract