develops from tube intermediate mesoderm Mullerian duct paramesonephric duct XAO:0000330 GAID:1309 Paired ducts of the embryo that run down the lateral sides of the urogenital ridge and terminate at the mullerian eminence in the primitive urogenital sinus. In the female, they will develop to form the fallopian tubes, uterus, and the upper portion of the vagina; in the male, they are lost. These ducts are made of tissue of mesodermal origin[WP]. develops either by lengthwise splitting of the archinephric duct (in chondrichthyans and some amphibians) or by a elongated invagination of the coelomic epithelium (other vertebrates) In males, the oviducts regress. The cranial end of the oviduct maintains an opening into the coelom (which primitively may have been the anteriormost coelomic funnels connecting the nephrocoel with the coelom). This opening is the ostium tubae[USM]. Muellerian duct RETIRED_EHDAA2:0001399 ductus paramesonephricus early paramesonephric duct MESH:D009095 AAO:0010141 EMAPA:27665 EHDAA2:0004048 NCIT:C13260 SCTID:308802006 Wikipedia:Paramesonephric_duct VHOG:0001199 Müllerian duct UBERON:0005318 mesoderm-derived structure lateral structure