Mrs. Barber & Ms. Goldsmith Nervous System Mrs. Barber & Ms. Goldsmith Copyright © 2002 Glenna R. Shaw and FTC Publishing All Rights Reserved

> < Level One Level One

Body divided into ringlike Well-developed digestive, Cerebrum Body divided into ringlike segments. Well-developed digestive, circulatory, nervous, and digestive systems Annelids $200

Spines stick out from inside Move with tube feet. Food and skeleton. Move with tube feet. Food and wastes pass through same opening. Echinoderms $400

Well-developed body systems. Many haves hells. Move with muscular foot. Mollusks $600

Sponge Live in water, attached to objects. Hollow body open at top. Water flows through pores into body. Cells with flagella filter food from water. Wastes flow out of opening at top. Sponge $800

Platyhelminthes Some free-living; others parasites, living in and on other organisms. Definite head and tail end. Food and wastes pass through same opening. Platyhelminthes $1000

> < Level Two Level Two

Coelenterates Live in water, sometimes attached, sometimes floating. Armlike tentacles with stinging cells catch food and push it through opening. \Wastes flow out of same opening. Coelenterates $2000

Some free-living, others parasites. Wastes go out through anus, Smooth body. Food enters mouth. Wastes go out through anus, at other end of digestive system : Nematodes $4000

legs, bodies with 2 or more sections; Jointed legs, bodies with 2 or more sections; exoskeleton Arthropods $6000

Trichina, pinworm, Hookworm, Roundworm Nematodes $8000

Fly, lobster, honey bee, spider Arthropods $10000

> < Level Three Level Three

Clam, scallop, snail, squid, octopus Mollusks $20000

Earthworm, sandworm, leech Segmented worms Annelids $40000

Starfish, sea urchin, sand dollar Echinoderms $60000

Venus’s flower-basket Bath sponge, elephant’s ear sponge, Venus’s flower-basket Sponge $80000

Planaria, tapeworm, fluke Flatworm Platyhelminthes $100000

> < Level Four Level Four

Hydra, jellyfish, coral, sea anemone Coelenterates $200000

Give an examples of Arthropods: Fly, lobster, honey bee, spider $400000

Coelenterates Hydra, jellyfish, coral, sea anemone Give an examples of $600000

Mollusks Clam, scallop, snail, squid, octopus Give an examples of $800000

Echinoderms : Starfish, sea urchin, sand dollar Give examples of $1000000

You’ve recovered the sunken millions. Congratulations! You’ve recovered the sunken millions.