Mesonephric duct2)ureteric bud → ureters, renal pelvis, calyces,collectingtubulesCo集食小管中肾管生后肾原基Mesonephduetblasteai肾小盘Minor calyx中贤管肾大盏Maorcaly输尿管芽肾孟BratericBeivl输尿管芽Ureteriehud肾孟Renalpelvis输尿管泄殖腔CloacLreterAC生后肾原基anephtogenLblasteea
2) ureteric bud → ureters, renal pelvis, calyces, collecting tubules Mesonephric duct
3Metanephricblastemaa→nephrons-Bowman's capsule, renal tubules → open connectionto collecting tubules(Reciprocalinduction)Metanephrictissue capsNephronCellNo bud?SclustersRenalCollectingvesicleBowman'sCtubuleBAcapsuleFailure ofconnection?Distal convolutedDistal convolutedtubuletubuleGlomerulusGlomerulusHenle'sloop7ProximalconvolutedBowman'sCollectingBowman'stubulecapsuletubulescapsuleHenle'sloopED
3) Metanephric blastema → nephrons → No bud? Failure of Bowman's capsule, renal tubules → open connection to collecting tubules (Reciprocal induction) Failure of connection?
B81165
The urine-forming system肾被膜Capsule of kidney生后肾原基Metanephrogenic弓形集合blastema小管Arcuate肾小管collectingRenaitubuletubule直集合管Straightcollectingtubule远端小管Distal tubule血管球Glomerulus肾小囊近小管Renal capsuleProximaltubule肾单位祥Nephronloop
The urine-forming system
4) Kidneys ascend → abdomenMetanephrosMesonephrosGonadGonadAllantoisPhallusCloacaBladder-UrogenitalMetanephricsinustissueUreterRectumSacralregion
4) Kidneys ascend → abdomen Sacral region