obsolete_choroid plexus true http://purl.obolibrary.org/obo/UBERON_0001886 2.38 The choroid plexus is a brain structure located in the spaces inside the brain called ventricles. The choroid plexus makes the fluid that fills the ventricles and surrounds the brain and spinal cord. true Use http://purl.obolibrary.org/obo/UBERON_0001886 label: choroid plexus BTO:0000258 The choroid plexus is tissue located in the spaces inside the brain called ventricles. The choroid plexus makes the fluid that fills the ventricles and surrounds the brain and spinal cord. James Malone