title: The embryonic lympho-neuro-endocrine relationship.
mesh_terms: D000818:Animals; D002060:Bursa of Fabricius / Q000276:immunology / Q000473:pathology / Q000648:ultrastructure; D002642:Chick Embryo; D004702:Endocrine Glands / Q000276:immunology*; D008221:Lymphoid Tissue / Q000276:immunology*; D009420:Nervous System / Q000276:immunology*; D010902:Pituitary Gland / Q000276:immunology / Q000473:pathology / Q000648:ultrastructure; D013950:Thymus Gland / Q000276:immunology / Q000473:pathology / Q000648:ultrastructure