The anatomy and function of 'free' nerve endings in an amphibian skin sensory system.
D000200:Action Potentials; D000344:Afferent Pathways; D000818:Animals; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D009411:Nerve Endings / Q000502:physiology / Q000648:ultrastructure*; D012867:Skin / Q000294:innervation*; D014981:Xenopus / Q000196:embryology