It shows some other invertebrates such as Mollusks, Echinoderms, Arthropods and the four main classes that are Arachnids, Centipedes and Millipedes, Crustaceans, and Insects and their characteristics.

1. WHAT ARE OTHER
INVERTEBRATES

2. Mollusks
Properties
◦Soft bodies
◦Have shells
◦Bilateral symmetry
◦Squid and octopus have internal shell-like
structure
Sea Clam
Octopus
Snail

3. Echinoderm
Properties:
◦Spiny –skinned
◦ Internal supporting structure called
endoskeleton
Sea cucumber
Sea urchin
Sand dollar

4. 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

5. Four Main Arthropod Classes
1.Arachnids
2.Centipedes and Millipedes
3.Crustaceans
4.Insects

6. 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

7. Arachnids
Daddy Long Legs
Mites
Scorpion

8. Crustaceans
Crab
Shrimp
Barnacles
Sow bug

9. Centipedes and Millipedes
MillipedesCentipedes

10. Insects
Dragon Fly Termites Fleas

11. SCIENCE GRADE 4
MRS. DEEMA ANABOSI