B and T lymphocyte development and identification.
D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D002060:Bursa of Fabricius / Q000276:immunology; D002645:Chickens; D006801:Humans; D013601:T-Lymphocytes / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology