Understanding the Function of Ureters
The role of the ureters in the human body is to facilitate the transportation of urine from the kidneys to the bladder. After the kidneys have filtered the blood and eliminated waste products like urea, the urea combines with water and other waste materials in the kidney’s nephrons, resulting in the formation of urine. This urine then flows into the ureters.
The ureters are equipped with muscles in their walls that contract and relax, creating a peristaltic wave-like motion. This motion helps to propel the urine down and away from the kidneys, ensuring a continuous flow towards the bladder. Approximately every 10 to 15 seconds, the ureters deliver urine into the bladder.
The bladder, which can hold around one and a half to two cups of urine, functions as a storage reservoir. When the ureters fill the bladder with urine, the muscles in the bladder wall contract. This contraction sends signals to the brain, indicating the need to find a bathroom and initiate the process of urination.
Ureter Blood Supply
The blood supply to the ureters is provided by several arteries. The renal artery is responsible for supplying blood to the part of the ureter that is closest to the kidney. In the middle section of the ureters, blood is received from the iliac arteries in both men and women. However, in men, the testicular artery also contributes to the blood supply, while in women, it is the ovarian artery. The section of the ureters that is closest to the bladder receives its blood supply from the middle rectal artery and the superior vesical artery. In men, the inferior vesical artery also contributes to the blood supply of this section, while in women, it is the vaginal and uterine arteries.