INVERTEBRATES

Neon slug

Pictures of invertebrates link

BY ANA RUPEREZ BY ANA RUPEREZ

INVERTEBRATES

Animals that don’t have a backbone are called invertebrates.

They can live in many different habitats: water, soil, air..

Some of them, such as jellyfish and worms have no protection for their soft bodies.

Others, such as snails and clams, have a soft body inside a hard shell.

What is an invertebrate? (GAME)http://www.butterflyschool.org/student/invertgame.html

Think of some animals that live in water, soil or air and don't have a backbone…

WATER SOIL AIR

SPONGES

No mouth, stomachs, or other organs

Most live in oceans Cannot move They stink a lot They filter the water to

eat They can grow back

any broken part.

Experiment with sponges

We touch, see and smell two species of sponges. We describe and draw them. We have to make a hypothesis about what would

happen to them if they are introduced in water They will grow… They will be heavier… They will floate…. They will stink more…. They will absorb all the water….

We introduce the sponges inside the water and observe the changes. We describe the changes.

CNIDARIANS: INVERTEBRATES WITH STINGING CELLS

They have tentacles

They have a mouthThey live on the

ocean floorThey shoot

poisonous darts

jellyfish

Sea anemone

coral

WORMS

They can grow back parts if they lose parts.

Some worms can grow to 30 METERS long

An earthworm has hairs on it to help it go through the dirt!!!

Flatworm

Segmented

Roundworms

                                                             

ECHINODERMS: INVERTEBRATES WITH SPINY SKINS

They have bodies with at least 5 sections.

They have suction cup feet to walk

They use tubes to catch food.starfish

Sea urchinSea cucumber

MOLLUSK: INVERTEBRATES WITH SOFT BODIES

They live on land, fresh water and ocean water.

Some make shells from minerals in the water.

Two shelled mollusks have a big foot to pull themselves along.

squid

snail

octopus

Clammussel

ARTHROPODS: ANIMALS WITH ARTICULATED LEGS

THERE ARE 4 GROUPS

ARTHOPODS

They have keen sense organs They have exoskeletons. They have two or more segments

CRUSTACEANS

They have 5 pairs of legs

They live near or on the ocean floor

Live on land and water

They have antennae

crab

shrimplobster

ARACHNIDS

Spiders, mites and ticks.

4 pairs of legs Most live on land. Some live in fresh

water They are called

parasites.

SPIDER

MITES

TICK

INSECTS

Largest group of arthropods

3 pairs of legs 3 main body part

sections Compound eyes Have mouths

fly

beetle

grasshopper

butterfly

MILLIPEDES & CENTIPEDES

Many body segments Live under rocks &

dark places Really have less than

100 legs Protects itself by

curling up Millipedes have 4 legs

on each segment Centipedes have 2

legs on each segment

millipede

centipede