title: The subendocardial Purkinje fiber of the duck.
mesh_terms: D000818:Animals; D004372:Ducks / Q000033:anatomy & histology*; D006329:Heart Conduction System / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D011690:Purkinje Fibers / Q000648:ultrastructure*