title: The fusion of dorsal and ventral endocardial cushions in the embryonic chick heart: a study in fine structure.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002449:Cell Aggregation; D002642:Chick Embryo / Q000033:anatomy & histology*; D003239:Connective Tissue Cells; D004699:Endocardium / Q000166:cytology / Q000196:embryology*; D004721:Endoplasmic Reticulum; D006056:Golgi Apparatus; D006321:Heart / Q000196:embryology*; D008264:Macrophages; D008722:Methods; D008854:Microscopy, Electron; D008928:Mitochondria; D008938:Mitosis; D009206:Myocardium / Q000166:cytology; D013194:Staining and Labeling; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D014316:Tritium; D013936:Thymidine