INVERTABRATES

MOLLUSKS

• Soft bodies
• Thick muscular foot
• Take in oxygen through gills or lungs
• Some have shells

SPONGES

• Very simple animals
• Have many pores in their bodies
• Water moves into a cenral cavity and out through a big opening at the top
• They get food and eliminate waste through the flow of the water
• Specialized cells and oxygen from water

ARTHROPODS

• Jointed legs
• Segmented bodies
• Some have wings
• Have exoskeletons
• Breath through gills or air tubes

SEGMENTED WORMS

• Have long tube like bodies that are divided into segments
• Simplest organisms
• Lond digestive tube that runs through inner body
• Take in oxygen from the water through the skin

ECHINODERMS

• Have arms that extend out from the middle of the body
• Have tube feet that take in oxygen
• Have spines