INVERTEBRATES

MOLLUSKS

• Soft bodies
• Some have shells
• Thick muscular foot
• They take in oxygen through gills/lungs
• Ex. Slugs,Snails,Clams

SPONGES

• Have pores in their bodies
• Very simple animals
• They get food and eliminate waste
• Specialized cells for obtaining food and oxygen
• Water moves into their central cavity

ARTHROPODS

• Jointed legs
• Segmented bodies
• Some have wings
• Have exoskeletons and they breath through gills or air tubes
• Ex. Insects,Arachnids,Crustaceans

SEGMENTED WORMS

• Have long tube-like bodies that are divided into segments
• Simplest organisms with a nervous system and blood in vessels
• Long digestive tube
• Take in oxygen from skin
• Ex. Earthworms,Leeches

ECHINODERMS

• Have arms that extend out from the middle of thr body
• Have tubed feet that take in oxygen from the water
• Have spines
• Ex. Sea Star,Brittle Star,Sea Cucumber