title: Ultrastructure of the blood vessels in the chick allantois and chorioallantois.
mesh_terms: D000818:Animals; D001808:Blood Vessels / Q000166:cytology* / Q000196:embryology; D002196:Capillaries / Q000166:cytology; D002454:Cell Differentiation; D002642:Chick Embryo; D004707:Endoderm / Q000166:cytology; D004847:Epithelial Cells; D005321:Extraembryonic Membranes / Q000098:blood supply*; D008648:Mesoderm / Q000166:cytology; D008854:Microscopy, Electron; D009940:Organoids