🫘 Loop of Henle: Countercurrent Multiplier and the Osmotic Gradient

Watch a 3D cutaway of the renal medulla build a 300 to 1200 mOsm gradient: the thick ascending limb pumps NaCl out (single effect of about 200 mOsm), the countercurrent flow multiplies it, and ADH, urea, loop length, tubular flow and blood flow decide whether the collecting duct makes concentrated or dilute urine. Educational, non-diagnostic.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install