Additional information about the ureter, urethra, and kidneys:
1. In adults, the ureter is 10 to 12 inches long. The tube is made up of fibers, muscle, and mucous coatings and has substantial walls that can compress. If problems arise, the urine flow is interrupted, which can lead to pyelonephritis (kidney inflammation), renal function loss, or renal calculi (kidney stones). Treatment options include the placement of a catheter or a stent. If an infection is discovered, antibiotics are commonly administered.
2. The bladder enables infrequent and controlled urination. The layers of muscle tissue line the bladder, stretching to contain pee. The bladder’s usual volume is 400-600 mL. The bladder muscles compress, and two sphincters open to allow urine to flow out during urination.
3. The kidneys filter waste, regulate fluid balance and maintain adequate electrolyte levels in the body. About 40 times every day, all of your blood travels through the kidneys.

References
The Healthline Editorial Team. (2018, January 20). Ureter. Healthline. https://www.healthline.com/human-body-maps/ureter#1

Hoffman, M. (2009, September 11). The kidneys: Picture, function, conditions, tests, treatments. WebMD. https://www.webmd.com/kidney-stones/picture-of-the-kidneys

Hoffman, M. (2009, July 29). The bladder (Human anatomy): Function, picture, location, definition. WebMD. https://www.webmd.com/urinary-incontinence-oab/picture-of-the-bladder

Urinary bladder. (n.d.). Welcome to SEER Training | SEER Training. https://training.seer.cancer.gov/anatomy/urinary/components/bladder.html