title: Ultrastructure of oral (buccopharyngeal) membrane formation and rupture in the hamster embryo.
mesh_terms: D000818:Animals; D002610:Cheek / Q000196:embryology; D006224:Cricetinae / Q000196:embryology*; D004475:Ectoderm / Q000648:ultrastructure; D004707:Endoderm / Q000648:ultrastructure; D008566:Membranes / Q000196:embryology; D008854:Microscopy, Electron; D009055:Mouth / Q000196:embryology*; D010614:Pharynx / Q000196:embryology