urethral sphincter

A sphincter muscle surrounding the urethra. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the urethral sphincter is

A sphincter muscle surrounding the urethra. The atlas records it as a muscle at the organ scale in the human body.

Where the urethral sphincter is

It sits within the muscular and urinary systems. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the urethral sphincter connects to

The atlas records 6 typed relationships for it, across 3 kinds of connection. part of lower urinary tract and urethra.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the urethral sphincter. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as sphincter muscle of urethra, sphincter of urethra, sphincter urethrae and urethral sphincter muscle. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0004917, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: lower urinary tract and urethra.
• A kind of: muscle structure and sphincter muscle.
• subtype: external urethral sphincter and internal urethral sphincter.

Questions

Where is the urethral sphincter?

It sits within the muscular and urinary systems. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the urethral sphincter connect to?

Part of: lower urinary tract and urethra.

Is the urethral sphincter the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.