Histogenesis of the yolk sac in the chick.
D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo / Q000254:growth & development*; D005260:Female; D006651:Histocytochemistry; D008854:Microscopy, Electron; D014817:Vitelline Membrane / Q000032:analysis / Q000254:growth & development*