title: Lymphocyte differentiation in the chicken embryo--relationship to the microenvironment.
mesh_terms: D000818:Animals; D001772:Blood Cell Count; D001853:Bone Marrow / Q000276:immunology; D001854:Bone Marrow Cells; D002060:Bursa of Fabricius / Q000166:cytology; D002454:Cell Differentiation; D002642:Chick Embryo; D005865:Gestational Age; D007958:Leukocyte Count; D008214:Lymphocytes / Q000276:immunology*; D013154:Spleen / Q000166:cytology; D013194:Staining and Labeling; D013950:Thymus Gland / Q000166:cytology