nasolacrimal duct

The paired channels leading from the lacrimal sacs to the inferior meatus of the nose, through which tears are conducted through the nasal cavity. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the nasolacrimal duct is

The paired channels leading from the lacrimal sacs to the inferior meatus of the nose, through which tears are conducted through the nasal cavity. The atlas records it as a organ at the organ scale in the human body.

Where the nasolacrimal duct is

It sits in the head, within the sensory system. 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 nasolacrimal duct connects to

The atlas records 10 typed relationships for it, across 6 kinds of connection. part of lacrimal drainage system.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the nasolacrimal duct. 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 nasolacrimal duct - posterior naris, d. nasolacrimalis, lacrimal duct and tear duct. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002392, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: lacrimal drainage system.
• A kind of: anatomical conduit and duct.
• contains: stratified columnar epithelium, lacrimal sac and mucosa of nasolacrimal duct.
• connects: lacrimal sac and nasal cavity.
• contributes to morphology of: lacrimal apparatus.
• Develops from: nasolacrimal groove.

Questions

Where is the nasolacrimal duct?

It sits in the head, within the sensory system. 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 nasolacrimal duct connect to?

Part of: lacrimal drainage system.

Is the nasolacrimal duct 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.