Image: Wikimedia Commons

ureter

Tubes used in the urinary system in most animals

Entityorgan type class of anatomical entityQ9385

Also known as ureters

Instance of: organ type
, class of anatomical entity
Subclass of: urinary organ
, organ with organ cavity
1
Sources
1.Stated in Foundational Model of AnatomyRetrieved 2019-08-01
View statement on Wikidata ↗
, particular anatomical entity
Part of: urinary system
, upper urinary tract

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The ureters are tubes composed of smooth muscle that transports urine from the kidneys to the urinary bladder. In adult humans, the ureters are typically 20–30 centimeters long and 3–4 millimeters in diameter. They are lined with urothelial cells, a form of transitional epithelium, and feature an extra layer of smooth muscle in the lower third to aid peristalsis. The ureters can be affected by diseases including urinary tract infections and kidney stones. Stenosis is the narrowing of a ureter, often caused by chronic inflammation. Congenital abnormalities can cause development of two ureters on the same side or abnormally placed ureters. Reflux of urine from the bladder into the ureters is common in children.

Overview

All data

53 statements · 26% with external sources · numbers in brackets are citations

Arterial supply: superior vesical artery
Connects with: renal pelvis
urinary bladder
Development of anatomical structure: ureter development
Different from: urethra

On other databases

41 identifiers linking ureter across the web's reference databases

Data quality

statements

26%

externally sourced

Source last edited October 16, 2026. AIDB refreshes this page daily.

Suggest a fact or correction

Links

Use this data

curl https://aidb.si/api/v1/entities/Q9385

API docs, limits & keys

Cite this page

AIDB. (2026). ureter (Q9385). Retrieved from https://aidb.si/e/ureter-Q9385