Cell migration in the developing follicle of the bursa of Fabricius between cortex and medulla.
D000818:Animals; D002060:Bursa of Fabricius / Q000166:cytology / Q000196:embryology*; D003585:Cell Biology; D002454:Cell Differentiation; D002465:Cell Movement; D002642:Chick Embryo; D008854:Microscopy, Electron