part of part of has part has part in taxon coronet cell Tetrapoda Gnathostomata <vertebrates> Oncorhynchus mykiss hypothalamus circumventricular organ saccus vasculosus Although its function remains hypothetical, it may contain sensory receptors for depth chemical detection. Other probable functions are osmoregulation ionic transport skeletal growth and tooth regeneration, although other homeostatic functions are not excluded seasonal receptor[PMID:23820554] response to photoperiodic signals[PMID:23820554] UBERON:0034943 A circumventricular organ of the hypothalamus of many jawed fishes, protruding from the caudal infundibular wall. It is a vascularized neuroepithelium that consists of coronet cells, cerebrospinal fluid-contacting neurons and supporting cells. Ceri E Van Slyke Christopher J. Mungall