title: Differentiation of the chorionic epithelium of chick embryos maintained in shell-less culture.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo / Q000648:ultrastructure*; D002823:Chorion / Q000166:cytology / Q000648:ultrastructure*; D046508:Culture Techniques / Q000379:methods; D008855:Microscopy, Electron, Scanning; D013997:Time Factors