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Contents Invertebrates Porifera and Cnidaria Porifera Cnidaria HOME CONTENTS RESOURCES ACTIVITY LINKS Contents Invertebrates Porifera and Cnidaria Porifera Cnidaria Platyhelminthes Characteristics Nematodes Characteristics Annelids Characteristics Molluscs Characteristics Classification Arthropods Characteristics Classification Orders of insects Insect mouths Metamorphosis Echinoderms Characteristics Classification HOME BACK CLOSE

Resources HOME CONTENTS RESOURCES ACTIVITY LINKS What are porifera like? What are cnidaria like? What are Platyhelminthes like? What are Nematodes like? What are Annelids like? What are molluscs like? How are molluscs classified? Animation: Arthropods What are arthropods like? How are arthropods classified? Orders of insects What are insect mouths like? Metamorphosis of the monarch butterfly What are echinoderms like? How are echinoderms classified? Links Interactive activity: What do you know about invertebrates? HOME BACK CLOSE

Porifera have no organs. pores HOME CONTENTS RESOURCES ACTIVITY LINKS What are porifera like? Sponges water osculum channels atrium cavity Porifera have no organs. pores water + nutrients BACK CLOSE

gastrovascular cavity carnivorous HOME CONTENTS RESOURCES ACTIVITY LINKS What are cnidaria like? ENLARGE IMAGE radial symmetry soft body tentacles gastrovascular cavity carnivorous BACK CLOSE

gastrovascular cavity carnivorous HOME CONTENTS RESOURCES ACTIVITY LINKS What are cnidaria like? GO BACK Corals radial symmetry soft body tentacles gastrovascular cavity carnivorous jellyfish BACK CLOSE

Taenia tapeworm (parasite) HOME CONTENTS RESOURCES ACTIVITY LINKS What are platyhelminthes like? Platyhelminthes (flatworms) flat bodies divided into rings hermaphrodites soft body bilateral symmetry no skeleton Taenia tapeworm (parasite) BACK CLOSE

Nematodes (roundworms) HOME CONTENTS RESOURCES ACTIVITY LINKS What are nematodes like? Nematodes (roundworms) Pinworm cylindrical bodies no segments no respiratory system examples: trichina worms, pinworms soft body bilateral symmetry no skeleton BACK CLOSE

Annelids (segmented worms) HOME CONTENTS RESOURCES ACTIVITY LINKS What are annelids like? body wall Annelids (segmented worms) digestive tube cylindrical bodies divided into segments some are hermaphrodites coelom setae (hairs) head segments soft body bilateral symmetry no skeleton clitellum Earthworm BACK CLOSE

carnivores and herbivores lungs (terrestrial molluscs) HOME CONTENTS RESOURCES ACTIVITY LINKS What are molluscs like? bilateral symmetry soft body carnivores and herbivores lungs (terrestrial molluscs) gills (aquatic molluscs) metamorphosis valves head visceral mass foot BACK CLOSE

carnivores and herbivores lungs (terrestrial molluscs) HOME CONTENTS RESOURCES ACTIVITY LINKS GO BACK What are molluscs like? bilateral symmetry soft body carnivores and herbivores lungs (terrestrial molluscs) gills (aquatic molluscs) metamorphosis valves shell lung eyes visceral mass mouth stomach ENLARGE IMAGE BACK CLOSE

carnivores and herbivores lungs (terrestrial molluscs) HOME CONTENTS RESOURCES ACTIVITY LINKS GO BACK What are molluscs like? bilateral symmetry soft body carnivores and herbivores lungs (terrestrial molluscs) gills (aquatic molluscs) metamorphosis valves shell lung eyes visceral mass mouth stomach radula BACK CLOSE

Bivalves Gastropods Cephalopods How are molluscs classified? slug HOME CONTENTS RESOURCES ACTIVITY LINKS How are molluscs classified? Bivalves slug scallop snail mussel Gastropods limpet octopus Cephalopods nautilus cuttlefish BACK CLOSE

Animation: Arthropods HOME CONTENTS RESOURCES ACTIVITY LINKS Animation: Arthropods BACK CLOSE

What are arthropods like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are arthropods like? bilateral symmetry exoskeleton feeding habits vary trachea (terrestrial arthropods) gills (aquatic arthropods) moulting and metamorphosis thorax head abdomen ENLARGE IMAGE Wasp ENLARGE IMAGE BACK CLOSE

What are arthropods like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are arthropods like? wings ocellus bilateral symmetry exoskeleton feeding habits vary trachea (terrestrial arthropods) gills (aquatic arthropods) moulting and metamorphosis compound eye antenna mouth parts legs ENLARGE IMAGE GO BACK BACK CLOSE

What are arthropods like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are arthropods like? bilateral symmetry exoskeleton feeding habits vary trachea (terrestrial arthropods) gills (aquatic arthropods) moulting and metamorphosis abdomen ENLARGE IMAGE legs cephalothorax Spider chelicerae pedipalp BACK CLOSE

How are arthropods classified? HOME CONTENTS RESOURCES ACTIVITY LINKS How are arthropods classified? Arachnids Insects Crustaceans Myriapods BACK CLOSE

Orders of insects Hymenoptera Diptera Coleoptera Dermaptera Orthoptera HOME CONTENTS RESOURCES ACTIVITY LINKS Orders of insects Hymenoptera Diptera Coleoptera Dermaptera Orthoptera Hemiptera Lepidoptera Odonata Siphonaptera BACK CLOSE

What are insect mouths like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are insect mouths like? Ants have mouths for chewing. Butterflies have mouths for sucking. Bees have mouths for chewing and sucking. Mosquitoes have mouths for piercing and sucking. BACK CLOSE

What are insect mouths like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are insect mouths like? GO BACK Ants have mouths for chewing. Butterflies have mouths for sucking. Bees have mouths for chewing and sucking. Mosquitoes have mouths for piercing and sucking. BACK CLOSE

What are insect mouths like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are insect mouths like? GO BACK Ants have mouths for chewing. Butterflies have mouths for sucking. Bees have mouths for chewing and sucking. Mosquitoes have mouths for piercing and sucking. BACK CLOSE

What are insect mouths like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are insect mouths like? GO BACK Ants have mouths for chewing. Butterflies have mouths for sucking. Bees have mouths for chewing and sucking. Mosquitoes have mouths for piercing and sucking. BACK CLOSE

What are insect mouths like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are insect mouths like? GO BACK Ants have mouths for chewing. Butterflies have mouths for sucking. Bees have mouths for chewing and sucking. Mosquitoes have mouths for piercing and sucking. BACK CLOSE

THE METAMORPHOSIS OF A MONARCH BUTTERFLY HOME CONTENTS RESOURCES ACTIVITY LINKS The Metamorphosis of a Monarch butterfly THE METAMORPHOSIS OF A MONARCH BUTTERFLY SANTILLANA CLICK HERE BACK CLOSE

THE METAMORPHOSIS OF A MONARCH BUTTERFLY END HOME CONTENTS RESOURCES ACTIVITY LINKS The metamorphosis of a Monarch butterfly THE METAMORPHOSIS OF A MONARCH BUTTERFLY END SANTILLANA BACK CLOSE

What are echinoderms like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are echinoderms like? radial symmetry in adults internal skeleton of plaques carnivores most breathe through skin metamorphosis arms ambulacral system symmetrical planes BACK CLOSE

What are echinoderms like? HOME CONTENTS RESOURCES ACTIVITY LINKS What are echinoderms like? radial symmetry in adults internal skeleton of plaques carnivores most breathe through skin metamorphosis arms ambulacral system symmetrical planes ambulacral feet BACK CLOSE

How are echinoderms classified? HOME CONTENTS RESOURCES ACTIVITY LINKS How are echinoderms classified? Echinoidea Ophiuroidea sea urchin ophiura Stelleroidea Holothuroidea Crinoidea starfish sea cucumber sea lily BACK CLOSE

Interactive activity: What do you know about invertebrates? HOME CONTENTS RESOURCES ACTIVITY LINKS Interactive activity: What do you know about invertebrates? HOME BACK CLOSE

Links The Shape of Life Virtual Worm Tour HOME CONTENTS RESOURCES ACTIVITY LINKS Links GO TO WEBSITE The Shape of Life GO TO WEBSITE Virtual Worm Tour HOME BACK CLOSE