Page 25 - Crustaceans

Crustacea - Excretory System

 Nitrogenous wastes are excreted across thin

areas of cuticle in the gills.

 Freshwater crustaceans constantly threatened

by over-dilution with water.

 Gills must actively absorb Na and Cl .
+
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 Marine crustaceans have urine that is isosmotic

with blood.