THE IMMUNOLOGICAL COMPETENCE OF  THE THYMUS AND SPLEEN IN NEWBORN AND ADULT RAT.
D000486:Allergy and Immunology; D000818:Animals; D000831:Animals, Newborn; D006128:Growth; D007121:Immunocompetence; D008198:Lymph Nodes; D010829:Physiological Phenomena; D051381:Rats; D012106:Research; D013154:Spleen; D013950:Thymus Gland; D014180:Transplantation
ANIMALS, NEWBORN; EXPERIMENTAL LAB STUDY; GROWTH; IMMUNOLOGY; LYMPH NODES; RATS; SPLEEN; THYMUS GLAND; TRANSPLANTATION