Formation of germinal centers in the rat thymus.
D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology; D002454:Cell Differentiation; D005260:Female; D008198:Lymph Nodes / Q000166:cytology / Q000276:immunology; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D013950:Thymus Gland / Q000166:cytology* / Q000276:immunology