Postnatal development and properties of ultimobranchial follicles in the rat thyroid.
D000367:Age Factors; D000818:Animals; D001934:Branchial Region / Q000033:anatomy & histology / Q000254:growth & development*; D004847:Epithelial Cells; D008297:Male; D008722:Methods; D051381:Rats; D011919:Rats, Inbred Strains; D013961:Thyroid Gland / Q000033:anatomy & histology / Q000254:growth & development*; D013997:Time Factors