The Animal Kingdom

Simple Invertebrates From Sponges to Echinoderms

Invertebrate Animal without a backbone.

Major Phyla Sponges (Porifera) Sponges (Porifera) Coelenterates Coelenterates Flatworms Flatworms Roundworms Roundworms Segmented Worms (Annelids) Segmented Worms (Annelids) Mollusks Mollusks Echinoderms Echinoderms

Sponges (Porifera) Bath Sponge Bath Sponge Elephant’s Ear Sponge Elephant’s Ear Sponge Venus’s Flower Basket Venus’s Flower Basket

Sponge Characteristics Live in water Live in water Attach to objects Attach to objects Hollow body with opening at top Hollow body with opening at top Water flows through pores into body Water flows through pores into body Cells with flagella filter food from water Cells with flagella filter food from water Wastes flow out opening at top Wastes flow out opening at top

Coelenterates Hydra Hydra Jellyfish Jellyfish Coral Coral Sea Anemone Sea Anemone

Coelenterate Characteristics Live in water Live in water Sometimes attached Sometimes attached Sometimes floating Sometimes floating Armlike tentacles with stinging cells catch food & push through opening Armlike tentacles with stinging cells catch food & push through opening Waste flows out of same opening Waste flows out of same opening

Flatworms Planaria Planaria Tapeworm Tapeworm Fluke Fluke

Flatworm Characteristics Some Free-living Some Free-living Some parasites, live in and on other organisms Some parasites, live in and on other organisms Definite head & tail end Definite head & tail end Food and wastes pass through same opening Food and wastes pass through same opening

Roundworms Trichina Trichina Pinworm Pinworm Hookworm Hookworm

Roundworm Characteristics Some free-living Some free-living Some Parasites Some Parasites Smooth body Smooth body Food enters mouth Food enters mouth Wastes leave body through anus at other end of digestive system Wastes leave body through anus at other end of digestive system

Segmented Worms (Annelids) Earthworm Earthworm Sandworm Sandworm Leech Leech

Segmented Worm Characteristics Body developed into ringlike segments Body developed into ringlike segments Well developed digestive, circulatory, and nervous systems Well developed digestive, circulatory, and nervous systems

Mollusks Clam Clam Scallop Scallop Snail Snail Squid Squid Octopus Octopus

Mollusk Characteristics Well-developed body systems Well-developed body systems Many have shells Many have shells Move with muscular foot Move with muscular foot

Echinoderms Starfish Starfish Sea Urchin Sea Urchin Sand Dollar Sand Dollar

Echinoderm Characteristics Spines stick out from inside skeleton Spines stick out from inside skeleton Move with tube feet Move with tube feet Food & wastes pass through same opening Food & wastes pass through same opening

Complex Invertebrates The Arthropods

Arthropods Means jointed legs Means jointed legs Have bodies in 2 or more parts Have bodies in 2 or more parts Body covered with a tough exoskeleton Body covered with a tough exoskeleton Exoskeleton splits & is skaken off as animal grows – called molting Exoskeleton splits & is skaken off as animal grows – called molting New exoskeleton grows to take place of the old one New exoskeleton grows to take place of the old one

Classes of Arthropods Insects Insects Arachnids Arachnids Crustaceans Crustaceans Chilopoda (centipedes) Chilopoda (centipedes) Diplopoda (millipedes) Diplopoda (millipedes)

Insects Grasshopper Grasshopper Ant Ant Mosquito Mosquito Termite Termite Butterfly Butterfly Bee Bee Moth Moth Housefly Housefly

Insect Characteristics Three main body parts: head, thorax (middle region), and abdomen (lower region). Three main body parts: head, thorax (middle region), and abdomen (lower region). Three pairs of legs Three pairs of legs One pair of feelers or antennae One pair of feelers or antennae Most have wings Most have wings Some are social - live together & divide work Some are social - live together & divide work

Arachnids Spider Spider Mite Mite Tick Tick Scorpion Scorpion

Arachnid Characteristics Two body parts: head & thorax-abdomen Two body parts: head & thorax-abdomen Four pairs of legs Four pairs of legs No antennae No antennae Spinnerets of spiders produce silk to make webs for catching prey Spinnerets of spiders produce silk to make webs for catching prey

Crustaceans Crab Crab Lobster Lobster Shrimp Shrimp Barnacle Barnacle Water Flea Water Flea

Crustacean Characteristics Two body parts: head & thorax-abdomen Two body parts: head & thorax-abdomen Five pairs of walking legs plus swimmerets for swimming Five pairs of walking legs plus swimmerets for swimming Two pairs of antennae Two pairs of antennae Live in water Live in water

Chilopoda (centipedes) House Centipede House Centipede Field Centipede Field Centipede

Chilopoda Characteristics Wormlike body made up of many segments Wormlike body made up of many segments One pair of legs on each segment One pair of legs on each segment Claws on first segment give off poison that paralyzes prey Claws on first segment give off poison that paralyzes prey

Diplopoda Common Millipede Common Millipede Spotted-Snake Millipede Spotted-Snake Millipede

Diplopoda Characteristics Wormlike body with many segments Wormlike body with many segments Two pairs of legs on each segment Two pairs of legs on each segment Roll up in a ball when disturbed Roll up in a ball when disturbed