A presentation about invertebrates for kids that do science in English. grade 3

1. Invertebrate Animals

2. Classification of Animals
Scientists have divided the Animal
Kingdom into two main groups:
vertebrates
(animals with a
backbone)
invertebrates
(animals without a
backbone)
and

3. Invertebrates
Animals without a backbone.

4. Vertebrates
Animals with a backbone.

5. Invertebrates
Animals without backbones can be divided into seven more
groups:
Arthropods
Molluscs
Echinoderms
Sponges
Worms
Jellyfish
Corals

6. Invertebrates
Each group is divided into other groups:
MOLLUSCS
Gastropods
Arachnids
Crustaceans
Myriapods
ARTHROPODS
Insects
Bivalves
Cephalopods

7. ARTHORPODS: general
characteristics
• Biggest group of invertebrates
• CRUSTACE
ANS
• Lay eggs.
• Have exoskeleton
• Have lungs and need
air to breathe.
• Have 6
legs.
• ARACH
NIDS
• INSECT
S.
• MYRIA
PODS

8. INSECTS
Biggest group of Invertebrates
• They have 6 legs and two antennae
• They have exoskeleton.
• They lay
eggs.
• Most of them have wings like the
wasp, the bee, the butterfly

9. INSECTS
• Their body is divided into three parts:
• ABDOMEN
• THORAX• HEAD

10. Arachnids
• Have exoskeleton.
• 4 antennae.
• Two eyes.
• Most have 8 legs and 2 claws.
• Lay eggs.
• A spider is an
arachnid.

11. Arachnids
• A scorpion is an arachnid.
• A tick is an arachnid.
• A spider is an arachnid.

12. MOLLUSCS
Molluscs can be divided into three subgroups:
Molluscs have a soft body.
They lay eggs, so they are oviparous
They live in water or moist places
Some have a shell.
Gastropods Cephalopods Bivalves

13. MOLLUSCS
SHELL.
SOFT BODY.
ANTENNAE.

14. MOLLUSCS
Squids are molluscs.
Mussels are molluscs.
Snails are molluscs.

15. OTHER INVERTEBRATES
• Cnidarians have tentacles.
– Corals and Jellyfish are cnidarians

16. OTHER INVERTEBRATES
• Echinoderms live in the water.
. Echinoderms include starfish, sea lilies,
feather stars, brittlestars, sea cucumbers, and
sea urchins.

17. OTHER INVERTEBRATES
• Annelids are segmented worms.
• Their boy is divided into many little
segments.
• Earthworms and leeches are annelids