Linked from
The 26 pages that link to Kidney, each with the reason it gives.
UreaRelated: The kidneys remove urea from blood and regulate its concentration.
Vitamin DRelated: They perform the final activation step that produces calcitriol.
Uric acidRelated: The kidneys excrete most uric acid and regulate circulating urate levels.
Urea cycleRelated: The kidneys excrete urea after the liver has synthesized it.
Parathyroid hormoneRelated: The kidney is a direct PTH target and activates vitamin D.
Urinary bladderRelated: Urine reaches the bladder from the kidneys through the ureters.
CalcitriolRelated: Kidney cells produce most circulating calcitriol by activating its precursor.
GlutamineRelated: Renal glutamine metabolism produces ammonium and helps regulate acid–base balance.