title: Phylogeny of the lymphoid system. I. A study of the fate of circulating lymphocytes in plaice.
mesh_terms: D000818:Animals; D001345:Autoradiography; D005075:Biological Evolution; D002465:Cell Movement; D005399:Fishes / Q000276:immunology*; D005880:Gills / Q000166:cytology; D007422:Intestines / Q000166:cytology; D007668:Kidney / Q000033:anatomy & histology / Q000166:cytology; D008099:Liver / Q000166:cytology; D008196:Lymph / Q000166:cytology; D008208:Lymphatic System / Q000033:anatomy & histology; D008214:Lymphocytes; D008221:Lymphoid Tissue; D012313:RNA / Q000096:biosynthesis; D013048:Specimen Handling; D013154:Spleen / Q000033:anatomy & histology / Q000166:cytology; D013950:Thymus Gland / Q000166:cytology; D014316:Tritium; D014529:Uridine / Q000378:metabolism; D014556:Urine / Q000166:cytology
chemical_list: D014316:Tritium; D012313:RNA; D014529:Uridine