cell physiology phenotype nervous system physiology variant accessory cell physiology variant C_elegans_phenotype_ontology WBPhenotype:0000974 accessory cell physiology abnormal Animals exhibit variations in any physical or chemical process required by a subset of interfacial cells to carry out its normal function or be able to perceive and respond to stimuli, compared to control. It can refer to socket cells, sheath cells and structural cells or their processes (Wormatlas).