The role of the thymus in the ontogeny of the immune system.
D000818:Animals; D000917:Antibody Formation; D006386:Hemagglutination Tests; D008198:Lymph Nodes / Q000254:growth & development*; D008221:Lymphoid Tissue / Q000254:growth & development*; D012157:Mononuclear Phagocyte System / Q000254:growth & development*; D009929:Organ Size; D010950:Plasma Cells; D051381:Rats; D013154:Spleen / Q000254:growth & development* / Q000637:transplantation; D013934:Thymectomy; D013950:Thymus Gland / Q000502:physiology* / Q000637:transplantation; D014184:Transplantation, Homologous