part of part of contributes to morphology of collecting duct of renal tubule MESH:D007685 EMAPA:28407 collecting duct ureteric tree TAO:0005294 ZFA:0005294 EV:0100391 kidney collecting duct CALOHA:TS-0860 The collecting duct is a portion of the nephron through which water flows, moving passively down its concentration gradient. SCTID:28202009 GAID:434 Wikipedia:Collecting_tubule FMA:15628 collecting tubule renal collecting tubule kidney collecting tubule BTO:0000761 MA:0000371 UBERON:0001232 tubulus renalis arcuatus collecting duct system arcuate renal tubule tubulus renalis colligens junctional tube nephron kidney renal collecting system excretory tube