title: The extracardiac chromaffin cells of larval lampreys.
mesh_terms: D000818:Animals; D002838:Chromaffin System / Q000166:cytology* / Q000648:ultrastructure; D005399:Fishes / Q000033:anatomy & histology*; D005453:Fluorescence; D006651:Histocytochemistry; D007798:Lampreys / Q000033:anatomy & histology*; D007814:Larva / Q000033:anatomy & histology; D008854:Microscopy, Electron