has part has part has_part characteristic of has modifier abnormal blood vessel physiology abnormal nervous system physiology abnormal blood-cerebrospinal fluid barrier function anomaly in the function of the group of barriers and transport systems in the choroid plexus located in the lateral, third, and fourth brain ventricles that controls the entrance of substances into the cerebrospinal fluid from the blood abnormal blood-CSF barrier MPheno.ontology MP:0006088 abnormal functionality blood-cerebrospinal fluid barrier