title: Osmium-fixed and epon-embedded whole mounts of delicate specimens.
mesh_terms: D000818:Animals; D000845:Annelida; D004853:Epoxy Resins; D006652:Histological Techniques; D008643:Mesentery / Q000033:anatomy & histology; D008853:Microscopy; D009992:Osmium; D012617:Sea Urchins; D012867:Skin / Q000033:anatomy & histology; D013194:Staining and Labeling
chemical_list: D004853:Epoxy Resins; D009992:Osmium