Urinary System

Navigational overlay for the kidneys and urinary tract. Although the wiki has no dedicated kidney page yet, the kidney is already deeply embedded in the wiki’s bone-mineral endocrine axis: it is the principal target organ of fgf23 (via the klotho co-receptor), the main route of phosphate excretion, and the organ whose age-related functional decline drives hyperphosphatemia and secondary hyperparathyroidism. Renal aging (declining GFR, nephron loss, tubulointerstitial fibrosis) is therefore a hub connecting the endocrine-system, musculoskeletal-system, and cardiovascular-system.

Key axes (pending dedicated pages)

• Phosphate / mineral handling: fgf23 → kidney NaPi-IIa/IIc downregulation; klotho (highly expressed in kidney; declines with age); hyperphosphatemia as the failure node
• Vitamin D activation: renal 1α-hydroxylase (CYP27B1) — declines with age and CKD
• Klotho is one of the most kidney-enriched anti-aging proteins; its renal loss is a proposed driver of systemic aging

Auto-aggregated tissue members

LIST FROM "tissues"
WHERE parent-system = "urinary-system" OR parent-system = "renal-system"
SORT file.name

Missing / planned pages

• kidney — now seeded as a stub (needs full content); the highest-priority page to flesh out in this system
• [[nephron]], [[bladder]], [[ureter]] — not yet seeded stub
• [[chronic-kidney-disease]], [[renal-aging]] — phenotypes not yet seeded stub
• [[podocytes]], [[renal-tubular-cells]] — cell types not yet seeded stub

See also

• by-organ-system — index of all body-system MOCs
• endocrine-system — the kidney is the effector organ of the PTH–FGF23–Klotho–vitamin D axis
• klotho — the kidney-enriched anti-aging protein