title: Heterogeneity of lymphocyte populations.
mesh_terms: D000818:Animals; D000921:Antibody-Producing Cells; D002454:Cell Differentiation; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D008214:Lymphocytes / Q000276:immunology / Q000502:physiology; D008221:Lymphoid Tissue / Q000276:immunology; D008297:Male; D008322:Mammals; D013950:Thymus Gland / Q000166:cytology