Physiology
The nephron: filtration and reabsorption
Updated: 3 October 2026
Reading time · 1 min See illustrations
Understand through movement
3D animation3:33
How Your Kidneys Work
Nucleus Medical Media · Video in English
Subject illustration · NIDDK / NIH
This animation opens on its publisher’s website.
01The role
The nephron is the kidney’s working unit, combining a filter and a tubule.
02The mechanism
The glomerulus lets water and small molecules pass; blood cells and large proteins normally stay in circulation.
03Coordination
The tubule reclaims most water and useful substances and adjusts waste removal.
04Key point
Filtration rate and urine albumin assess complementary aspects of kidney health.
Medical references
This general information does not replace a consultation. Tests and treatments are selected for each individual; they are not a routine checklist.
Explore this topic further
Continue with related explanations of how the body works and treatment options.