Gdz Biologiia 7 Sumatokhin Klass Dvukhstvorchatye Molliuski Onlain -

: They breathe through plate-like gills (ctenidia) located in the mantle cavity.

: The nervous system is simplified, consisting of three pairs of ganglia. Ecological and Economic Importance : They breathe through plate-like gills (ctenidia) located

: Most bivalves are filter feeders. They draw water into their mantle cavity through a siphon, where specialized gills trap organic particles. Internal Systems : They breathe through plate-like gills (ctenidia) located

: They possess an open circulatory system with a heart and vessels. : They breathe through plate-like gills (ctenidia) located