sponges
DESCRIPTION
Sponges. Simplest animal Lives in salt water Two layers of cells. Coral, sea flowers, and Jellyfish. Live in ocean Have tentacles with stinging cells Float to move – trap food Coral stays in one place. Flatworms. Flat bodies Parasites Tapeworms most common. Round worms. Many species - PowerPoint PPT PresentationTRANSCRIPT
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SpongesSimplest animalLives in salt waterTwo layers of cells
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Coral, sea flowers, and Jellyfish Live in ocean Have tentacles with stinging cells Float to move – trap food Coral stays in one place
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Flatworms Flat bodies Parasites Tapeworms most common
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Round worms Many species Parasites Hook worms found in soil Round worms found in dirty water
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Segmented worms Body is in segments – parts Earth worms – tunnel through soil Leeches – blood sucking – used in medicine
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Spiny skinned Starfish, sea urchins, sea cucumbers, sand
dollars Starfish most well known, have tubed feet Starfish turn stomaches inside out to eat clams Starfish are not fish
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mollusks Can live anywhere Most have shells and soft bodies Have muscular foot Snails, clams, octopus, squid
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Arthopods Having joined legs –section bodies Ectoskeleton Largest group of invertebrates Includes insects,, centipedes, millipedes
arachnids , crustaceans
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Insects 6 legs 3 body parts, head, abdomin, throax Most have wings, some 2 sets Pair of antenne on head
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Arachnids 8 legs 2 body parts, head – body Spiders, ticks, horseshoe crabs
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Crustaceans
Considered an acrahnid 8 legs, 2 body parts
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Centipedes and millipedes Centipedes have one pair of legs per segment
they eat insectsMillipedes have two pair of legs per section
decomposers
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Which one A or B is the millipede