part of part of develops_from developmentally_induced_by mesonephric tubule ureteric bud An epithelial swelling on the Wolffian duct that elongates to invade the adjacent metanephric mesenchyme[MP] BTO:0001646 EHDAA2:0002140 EHDAA:3091 EHDAA:5917 EMAPA:17209 EMAPA:17376 Outgrowth of the mesonephric duct that penetrates the metanephric mesoderm and forms the ureter, renal pelvis, major and minor calyces and collecting ducts. [Embryology, See_Dudek_RW_and_Fix_JD, Third_Edition_(2004)_Philadelphia:_Lippincott_William_and_Wilkins, p.137][VHOG] Outgrowth of the mesonephric duct that penetrates the metanephric mesoderm and forms the ureter, renal pelvis, major and minor calyces and collecting ducts[VHOG:0000541]. The first embryonic hint of a metanephros is the formation of the metanephric duct that appears as a ureteric diverticulum arising at the base of preexisting mesonephric duct. The ureteric diverticulum grows dorsally into the posterior region of the nephric ridge. Here it enlarges and stimulates the growth of metanephric tubules that come to make up the metanephric kidney. The metanephros becomes the adult kidney of amniotes, and the metanephric duct is usually called the ureter.[well established][VHOG] UBERON:0000084 UMLS:C1284058 VHOG:0000541 diverticulum diverticulum metanephricum gemma ureterica metanephric bud metanephric diverticulum uberon ureteric ampulla ureteric diverticulum mesonephric duct metanephric mesenchyme epithelial sac epithelial layer of duct