The collecting duct is a portion of the nephron through which water flows, moving passively down its concentration gradient.

Renal duct that collects the output from renal tubules.[TAO]

in ISBN:0073040584 (Vertebrates, Kardong), the nephron is adjacent to the collecting tubule, consistent with FMA, but not GO. Wikipedia says: Many sources include the connecting tubule as part of the collecting duct system. However, the embryological origin is more similar to the nephron than it is to the rest of the collecting duct (which derives from the ureteric bud), and other sources therefore classify the connecting tubule with the nephron

tubulus renalis colligens, tubulus renalis arcuatus, collecting duct, kidney collecting duct, renal collecting tubule

uberon

junctional tube, kidney collecting tubule, arcuate renal tubule, collecting tubule, ureteric tree, collecting duct system

UBERON:0001232

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

• uriniferous tubule