title: The ultrastructure of embryonic myocardial blood vessels.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D003331:Coronary Vessels / Q000166:cytology / Q000196:embryology*; D004721:Endoplasmic Reticulum; D005347:Fibroblasts; D006056:Golgi Apparatus; D006352:Heart Ventricles / Q000166:cytology / Q000196:embryology; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000196:embryology