| filtration fraction | The fraction of the plasma entering the kidney that filters into the lumen of the renal tubules, determined by dividing the glomerular filtration rate by the renal plasma flow; normally, it is around 0.17. (05 Mar 2000) |
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| filtration slits | The intercellular clefts between the interdigitating pedicels of podocytes; they are part of the filtration barrier of renal corpuscles. Synonym: filtration slits. (05 Mar 2000) |
| filtration space | |
| filtrum | |
| filtrum ventriculi |