Term Name:	circumventricular organ
Synonyms:	circumventricular organ, circumventricular organ of neuraxis, CVO
Definition:	Any of any of the secretory or sensory organs located in the brain region around or in relation to the ventricular system that are characterized by extensive vasculature and a lack of a normal blood brain barrier (BBB) and allow for the linkage between the central nervous system and peripheral blood flow.
Ontology:	Cell Ontology [UBERON:0005408]