INVERTEBRATES

MOLLUSK

• Soft bodies
• Thick foot
• They take in oxygen through lungs or gills
• Some have shells

GROUPS OF MOLLUSK

• Bivalve
• Gastropods
• Cephalopods

SPONGES

SPONGES

• Very simple animal
• Have many pores in there bodied
• Specialized cells for food and oxygen
• Water flows through them and waste comes out the top

ARTHROPODS

ARTHOPODS

• Jointed legs
• Segmented bodies
• Some have wings
• Have exoskeletons
• Breathe with gills or air tubes

TYPES OF ARTHOPODS

• Insects
• Arachnids
• Crustaceans

WORMS

WORMS

• Round segmented bodies and need to stay moist
• eat dirt and digest it
• Simple but also have a nervous system
• Reproduce sexually most of the time
• Breathe through skin

ECHINDOTERMS

ECHINDOTERMS

• Arms that extend from the middle
• Have spikes
• Have tube feet that take in oxogen

ECHINDOTERMS

• Ex:
• Sea star
• Brittle star
• Asea cucumbers
• Sea eruchin