Glomeruluar filtration
The glomerulus (red) filters fluid into the Bowman's capsule (blue) that sends fluid through the nephron (yellow). GFR is the rate at which is this filtration occurs.
This is a diagram of glomeruluar filtration. The glomerulus is seen filtering fluid into the Bowman's capsule that sends fluid through the nephron. GFR is the rate at which is this filtration occurs.
Source
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"Renal_corpuscle.svg."
https://en.wikipedia.org/wiki/Glomerulus_(kidney)#/media/File:Renal_corpuscle.svg
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