Biology / Bio 3243 · Atom · ~20 seconds
Excretory Organs Across Taxa: Flame Cells, Malpighian Tubules, Nephridia
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Non-vertebrate excretion solves filtration without the nephron's three-step architecture, instead using taxon-specific organs — flatworm flame cells, insect Malpighian tubules, and annelid nephridia — each achieving the same filtering goal by a different structural route.
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Malpighian tubules concentrate uric acid before it exits with feces, conserving water on land.
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These organs solve the nephron's same problem without sharing its filtration-reabsorption-secretion structure.