An epithelial swelling on the Wolffian duct that elongates to invade the adjacent metanephric mesenchyme[MP].

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]., 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]

uberon

metanephric diverticulum, metanephric bud, diverticulum, ureteric ampulla, gemma ureterica, ureteric diverticulum, diverticulum metanephricum

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

http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/cl.owl

• metanephric mesenchyme
• renal vesicle