Annelids– Segmented Worms True coelomates 5 beating hearts– closed circulatory system Bilateral symmetry Setae—bristles (for anchoring & traction)

Phylum Annelida includes earthworms & leeches

Mollusks– AKA “soft-bodied animals” Many have shells (“Valves”) Three-part body plan: head, visceral mass, muscular foot Mucous-covered mantle

Bivalves Clams, mussels, oysters

Gastropods– snails & slugs

Cephalopods– octopuses, squids, cuttlefish, chambered nautilus

Echinoderms Five-part radial symmetry Water-vascular system endoskeleton Echinoderms

Phylum Echinodermata includes sea stars, sea cucumbers, sea urchins

Echinoderms move by use of tube feet

Earthworms are hermaphrodites– but remember, they do NOT self-fertilize. They fertilize each other. The clitellum becomes a cocoon for the eggs.