INVERTEBRATES

MOLLUSKS

• Soft bodies
• Have muscular feet
• Some have shells
• Take in o2 through gills or limgs
• Ex:slugs,snails,squid

SPONGES

• Have many pores in their body
• They get food and eliminate waste
• Specialized cells for obtaining food and o2
• Very simmple animals
• Water moves into a central cavity

ARTHROPODS

• Jointed legs
• Segmented bodies
• Some have wings
• Have exsoskeloten
• Breathe through gills or air tubes

WORMS

• Have long tube like bodies
• Simplest organisms w/a nervous system
• Long digestive tube
• Take in o2 from water through there skin
• Ex:earthworms, leeches

ECHINODERMS

• Have arms that extend out from the middle
• Have tube feet that take o2 from wate
• Have spines
• Ex:sea stars,brittle stars,sea cucumbers