human_reference_atlas part of Homo sapiens organ part brain hindbrain brain ventricle EMAPA:32674 HBA:9418 ventricles of hindbrain One of the system of communicating cavities in the brain that are continuous with the central canal of the spinal cord, that like it are derived from the medullary canal of the embryo, that are lined with an epithelial ependyma, and that contain a serous fluid. FMA draws the distinction between e.g. 'fourth ventricle' and 'cavity of fourth ventricle'. The latter is a cavity, and part of the former, which is a region. The superclass of 'fourth ventricle' is_a 'region of ventricular system of the brain'. We place this class here, although it is not equivalent to ventricles, as it includes ventricle bodies. region of ventricular system of brain AS neuronames:2497 brain ventricles NCIT:C12356 Organ cavity of the brain which consists of the lateral ventricles, the third and fourth ventricles and the cerebral aqueduct[BIRNLEX:1356]. FMA:78447 BTO:0001442 MA:0000818 ventricles of hindbrain UBERON:0004086 uberon SCTID:180929003 UMLS:C0007799 MESH:D002552 EFO:0001914 cerebral ventricle BIRNLEX:1356