Your lungs filter gases across a surface the size of a studio apartment. Your kidneys filter blood across a surface the size of a placemat—but with efficiency that would make your lungs jealous.
Why the Difference?
Gas exchange requires a massive surface area for efficient oxygen uptake and carbon dioxide release—hence the lung’s sponge-like structure.
Glomerular filtration is more selective and pressure-driven, not diffusion-based—so it uses micro-scale sieving rather than massive area.
Your lungs filter gases across a surface the size of a studio apartment. Your kidneys filter blood across a surface the size of a placemat—but with efficiency that would make your lungs jealous.
Why the Difference?
Gas exchange requires a massive surface area for efficient oxygen uptake and carbon dioxide release—hence the lung’s sponge-like structure.
Glomerular filtration is more selective and pressure-driven, not diffusion-based—so it uses micro-scale sieving rather than massive area.
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