title: Electron microscopic identification of autonomic nerve endings.
mesh_terms: D000818:Animals; D001369:Axons / Q000166:cytology; D006168:Guinea Pigs; D007498:Iris; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000166:cytology*; D011817:Rabbits; D051381:Rats; D013194:Staining and Labeling; D014649:Vas Deferens