The development and involution of the lymphoid system and immunologic capacity.
D000818:Animals; D005075:Biological Evolution; D002060:Bursa of Fabricius / Q000276:immunology / Q000502:physiology; D002645:Chickens; D006410:Hematopoiesis / Q000502:physiology; D006689:Hodgkin Disease / Q000276:immunology; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007938:Leukemia / Q000276:immunology; D008208:Lymphatic System / Q000196:embryology; D009101:Multiple Myeloma / Q000276:immunology; D009374:Neoplasms, Experimental / Q000276:immunology; D011817:Rabbits; D013950:Thymus Gland / Q000276:immunology / Q000502:physiology