Invertebrates 2
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Transcript of Invertebrates 2
LAND INVERTEBRATES
• Invertebrate animals have a shell to protect their soft bodies. Some have a hard outside covering called an exoskeleton
Spider
Snail
beetle Wasp
Arthropods:insects
Beetle
GrasshopperGrasshopperAnt
Butterfly
Wasp
Ladybird
Dragonfly
What is an insect?• An insect has a hard outer skeleton
•It has a three part body: head, thorax and abdomen
•It has six legs
•An insect has antennae on his head.
•Most insects have two pairs of wings. • Not all insects fly.
Arachnids: spiders• They have eight legs• They have two main parts• They lay eggs• Their skin is covered with tiny hairs• They make silk using spinnerets on the end of
their abdomens
OCEAN INVERTABRATES Cnidarians
• Jellyfish and anemones are cnidarians• They have been around for millions of
years, they can sting but they are very beautiful.
• Jellyfish can only move vertically and are unable to swim, they rely on currents to move.
MOLLUSKS• They have soft body with no bones.• They have tentacles for feeling and seeing.• They can have one shell: cone snail,limpet
Cone snail
Limpet
Mollusks with two shells
• When they open their shells, water flows over their gills.
• The shell is closed tight for protection
Oyster Scallop Clams
Mollucks with no shell: Cephalpods
• They have to use other protection like tasting bad to predators, coloration or squirting purple ink.
• They move on a “foot” like a snail´s foot
Octopus Cuttlefish Squid
ARTHROPODSCrustaceans
• They have a hard outside covering. As they grow bigger, they have to crawl out of their old skeletons and grow new, bigger ones.
Crab Shrimps Lobster
ECHINODERMS• They have a hard outside covering.
• They move around on tiny tube feet.
Sea stars have Sea Urchins are
five or more arms covered with spines.
Creada la presentación
Por
MªÁngeles Cola
Para segundo ciclo de primaria bilingüe
Science: INVERTEBRATES