Mollusk have soft body and a thick muscular foot,some have shells,have gills or lungs,some are bivalves,some are Gastropods,some are Cephalopods

SPONGE

• Sponge:simplest invertebrates,live h20,use special
• Cellsto filter food are sessile,start as larva,have
• Flagella and spicules

ARTHOPODS

• Arthropod:have jointed legs,a segment
• Body,some have wings,have exoskeleton,
• Some molt,reproduce sexually,get o thought
• Gills or air tubes,3 types are insects,archnids,
• Cropustacean

Worms:
have long,tube-like legs bodies divided into segments,have a true nervous system (FEEL PAIN),have blood in vessels,take in o through their moist skin found every were,have muscles nerve and digestives isms

ECHINODERMS

• Echinoderms:echinoderms means
• Spiny skin,livein ocean/sea,have
• Arms that extend from there body,
• Adults have radial symmetry,some
• Move to feed and others filter feed,have a water vascular system