third ventricle
Part of the ventricular system of the brain, forming a single large cavity in the midline of the diencephalon; it is continuous with the lateral ventricles through the interventricular foramen and the fourth ventricle through the cerebral aqueduct. (Maryann Martone). Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the third ventricle is
Part of the ventricular system of the brain, forming a single large cavity in the midline of the diencephalon; it is continuous with the lateral ventricles through the interventricular foramen and the fourth ventricle through the cerebral aqueduct. (Maryann Martone). The atlas records it as a tissue at the tissue scale in the human body.
Where the third ventricle is
It sits within the nervous system. Positioned deliberately as part of this species body plan.
What the third ventricle connects to
The atlas records 12 typed relationships for it, across 5 kinds of connection. part of diencephalon.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the third ventricle. 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 3rd ventricle, ventriculus diencephali, diencephalic vesicle, diencephalic ventricle and ventriculus tertius cerebri. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002286, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- Part of: diencephalon.
- A kind of: brain ventricle.
- contains: choroid plexus of third ventricle, infundibular recess of 3rd ventricle, optic recess of third ventricle, pineal recess of third ventricle, tela choroidea of third ventricle and third ventricle choroid plexus epithelium, and 2 more.
- contributes to morphology of: diencephalon.
- overlaps: interventricular foramen of CNS.
Questions
Where is the third ventricle?
It sits within the nervous system. Positioned deliberately as part of this species body plan.
What does the third ventricle connect to?
Part of: diencephalon.
Is the third ventricle 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.