Uréteri

Uréteri refers to the ureters, which are a pair of tubes in the human body that carry urine from the kidneys to the bladder. Each ureter is approximately 25 to 30 centimeters long and is composed of smooth muscle tissue. The ureters originate at the renal pelvis of each kidney and pass retroperitoneally, meaning they are located behind the peritoneum, to the bladder. They are supported by the ureteroiliac ligaments, which anchor them to the iliac vessels and the bladder.

The ureters play a crucial role in the urinary system by transporting urine from the kidneys to the bladder. They are lined with transitional epithelium, which allows them to stretch and accommodate the varying volumes of urine. The ureters also have a peristaltic function, which helps to propel urine along their length.

In cases of urinary tract obstruction, the ureters can become dilated, leading to conditions such as hydronephrosis, where the kidneys become swollen due to the backup of urine. Ureteral stones, infections, and tumors can also affect the ureters, leading to symptoms such as flank pain, hematuria, and urinary frequency.

Diagnostic procedures for ureters include imaging studies such as ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI). Treatment options depend on the underlying condition and may include medication, surgical intervention, or minimally invasive procedures such as ureteroscopy.