<Tr> <Th> FMA </Th> <Td> 265239 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The collecting duct system of the kidney consists of a series of tubules and ducts that physically connect nephrons to a minor calyx or directly to the renal pelvis . The collecting duct system participates in electrolyte and fluid balance through reabsorption and excretion, processes regulated by the hormones aldosterone and vasopressin (antidiuretic hormone). </P> <P> There are several components of the collecting duct system, including the connecting tubules, cortical collecting ducts, and medullary collecting ducts . </P>

What is the collecting system of the kidney