title: Magnets in guitarfish vestibular receptors.
abstract: Black magnetic particles are intermixed with white crystalline otoconia in the inner ear gravity receptors of a saltwater ray. Their size and composition suggest that they are multidomains of magnetite-ilmenite.
mesh_terms: D000818:Animals; D002118:Calcium / Q000032:analysis; D007758:Ear, Inner / Q000032:analysis*; D052203:Ferrosoferric Oxide; D005399:Fishes / Q000502:physiology*; D007501:Iron / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D008280:Magnetics; D008465:Mechanoreceptors / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D010087:Oxides; D012444:Saccule and Utricle / Q000032:analysis; D014025:Titanium / Q000032:analysis
chemical_list: D010087:Oxides; C029232:ilmenite; D014025:Titanium; D007501:Iron; D008274:Magnesium; D002118:Calcium; D052203:Ferrosoferric Oxide