title: Immunohistochemical study of the ontogeny of the secretory immune system.
mesh_terms: D005314:Embryonic and Fetal Development; D005333:Fetus / Q000276:immunology; D005865:Gestational Age; D006801:Humans; D007107:Immune System / Q000378:metabolism*; D007070:Immunoglobulin A / Q000378:metabolism; D007144:Immunoglobulin J-Chains / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000378:metabolism; D007150:Immunohistochemistry; D012635:Secretory Component / Q000096:biosynthesis
chemical_list: D007070:Immunoglobulin A; D007144:Immunoglobulin J-Chains; D007075:Immunoglobulin M; D012635:Secretory Component