INVERTEBRATE ANIMALS

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