title: The early differentiation of thymic epithelial cords into the cortex and medulla.
mesh_terms: D000818:Animals; D006652:Histological Techniques; D006801:Humans; D011817:Rabbits; D051381:Rats; D013950:Thymus Gland / Q000033:anatomy & histology / Q000196:embryology* / Q000254:growth & development