WHAT ARE OTHER INVERTEBRATES

Mollusks

Properties

◦Soft bodies

◦Have shells

◦Bilateral symmetry

◦Squid and octopus have internal shell-like

structure

Sea Clam

Octopus

Snail

Echinoderm

Properties:

◦Spiny –skinned

◦ Internal supporting structure called

endoskeleton

Sea cucumber

Sea urchin

Sand dollar

Arthropods

Properties:

◦ They are the largest invertebrate phylum

◦ The have jointed legs

◦ Body divided into sections

◦ They have exoskeleton to protect them

◦ Exoskeleton made up off light tough material

called chitin which doesn’t grow

◦ Exoskeleton sheds off in a process called Molting

Four Main Arthropod Classes

1.Arachnids

2.Centipedes and Millipedes

3.Crustaceans

4.Insects

Head Leg and

Body Home Food

Special

Feature Fact

Arachnids• No Antennae

• Up to Eight

Eyes

• Four Pairs of

Legs

• Two body

section

A wide variety Hunters eating

insects

Poisonous

Spiders spin

webs.

Not all are

dangerous

Centipedes

and

Millipedes

_____

• 100 legs

• Segmented

bodies

• Under

rocks

• Dark damp

places

• Worms

• Slugs

• Insects

• Some have

poison claws

• “Centi”

means 100

Crustaceans

• Jaw like

structure for

crushing food

• Two pair of

antennae

• Ten or fewer

legs

• Claws

• Body has

sections

• Ocean

• Fresh water

• Land

• Animal

remains

• Sea weeds

• Other left

over

• Huge claws

for crab and

lobster

• Enjoy eating

shrimp

• Important

food for us

Insects • One pair of

antennae

• Three pairs of

legs

• Three body

sections [

head, thorax,

abdomen

• Land

• Air

• Fresh water

• Animals

• Plants

• Tube system

for breathing

• Compound

eyes

• The first

insect lived

about 350

million years

ago

Arachnids

Daddy Long Legs

Mites

Scorpion

Crustaceans

Crab

Shrimp

Barnacles

Sow bug

Centipedes and Millipedes

MillipedesCentipedes

Insects

Dragon Fly Termites Fleas

SCIENCE GRADE 4

MRS. DEEMA ANABOSI