vomeronasal organ

An organ thought to supplement the olfactory system in receiving pheromonic communication. The sensory part of the organ is in two long, thin sacs, situated on either side of the nasal septum at its base. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the vomeronasal organ is

An organ thought to supplement the olfactory system in receiving pheromonic communication. The sensory part of the organ is in two long, thin sacs, situated on either side of the nasal septum at its base. The atlas records it as a sense organ at the organ scale in the human body.

Where the vomeronasal organ 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 vomeronasal organ connects to

The atlas records 8 typed relationships for it, across 4 kinds of connection. part of nose, olfactory system and sensory system.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the vomeronasal organ. 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 Jacobson's organ, organon vomeronasale, organum vomeronasale, VNO and organ of Jacobsen. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002255, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: nose, olfactory system and sensory system.
• A kind of: anatomical structure, organ and sensory system.
• Develops from: olfactory placode.
• contains: epithelium of vomeronasal organ.

Questions

Where is the vomeronasal organ?

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 vomeronasal organ connect to?

Part of: nose, olfactory system and sensory system.

Is the vomeronasal organ 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.