Invertebrates

1. Classification:
Invertebrates

2. What is classification?
Due to the large number of
species of plants and animals,
scientist put similar animals in
groups. This is called
classification.

3. How are living things classified?

4. What are Vertebrates and
Invertebrates ?
Vertebrates are animals that
have a backbone while
invertebrates are animals
without a backbone.

5. Which animals are vertebrates?
These animals include:
Fish
Birds
Reptiles
Amphibians
Mammals

6. Which animals are invertebrates?
The groups of invertebrates
include: jellyfish and sea
anemones, flatworms,
roundworms, segmented
worms, molluscs, starfish and
sea urchins and arthropods.

7. Jellyfish and sea anemones
Jelly-like body.
Have tentacles with stinging
cells to catch food.

8. Flatworms
Flattened body with no
segments (divisions).

9. Roundworms
Long thin body with no
segments.

10. Segmented worms
Long, tube-shaped body made
of segments.

11. Molluscs
Many have a shell.
Body not in segments.
Move around on a muscular
foot.

12. Starfish and sea urchins
5 ‘arms’ or star-shaped pattern
on their bodies.
Spiny skins

13. Arthropods
Jointed legs.
Body has a hard outer skeleton
They can be divided into 4
smaller groups: Crustaceans,
Insects, Spiders, Centipedes
and millipedes.

14. Arthrodops: Crustaceans
Chalky outer skeleton.
Most live in water.

15. Arthropods: Insects
6 legs.
3 parts to the body.
Have wings.

16. Arthropods: Spiders
8 legs.
2 parts to the body.
No wings

17. Arthropods: Centipedes and
millipedes
Long body made up of
segments.
Many legs.