Embryology of the lymphoid system.
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D005865:Gestational Age; D006412:Hematopoietic Stem Cells / Q000276:immunology; D006413:Hematopoietic System / Q000196:embryology; D008208:Lymphatic System / Q000196:embryology* / Q000276:immunology; D051379:Mice; D008808:Mice, Inbred CBA; D008819:Mice, Nude; D009924:Organ Culture Techniques; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000196:embryology / Q000276:immunology