title: Migration of haemopoietic cells from the yolk sac to the thymus and the bursa of Fabricius in the chick embryo.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002060:Bursa of Fabricius / Q000166:cytology*; D002465:Cell Movement; D002642:Chick Embryo; D005260:Female; D008214:Lymphocytes / Q000502:physiology*; D008221:Lymphoid Tissue / Q000166:cytology; D013936:Thymidine; D013950:Thymus Gland / Q000166:cytology*; D014316:Tritium; D014817:Vitelline Membrane / Q000166:cytology*
chemical_list: D014316:Tritium; D013936:Thymidine