1. The characteristic of invertebrates :
-They haven’t got a spinal column or an internal
skeleton.
-They are multicellular.

2. -Invertebrates can have a hard shell.
-They also can have an exoskeleton.
-Some of these animals have got a soft body without
protection.

3. We can find six groups of invertebrates:
-Mollusks
-Annelids
-Echinoderms
-Jelyfish and polyps
-Arthropods
-Sponges

4. The characteristics of arthropods are:
-They have jointed parts and jointed legs.
-They have an exoskeleton.
Arthropods can divided into four groups:
-Insects
-Arachnids
-Crustaceans
-Myriapods

5. The characteristics of mollusks are:
-They’ve got soft body.
-Most of them have a hard shell.
-Many mollusks have a muscular foot.
Mollusks can divided into three groups:
-Bivalves
-Gastropods
-Cephalopods

6. The characteristics of sponges are:
-They live in the ocean.
-They can’t move around.
-They are filter feeders.

7. The characteristics of jelyfish and polyps are:
-They live in the ocean.
-They are carnivores.

8. The characteristics of echinoderms are:
-They live in the ocean.
-They’ve got tiny feet with suction cups.

9. The characteristics of annelids are:
-They are worms with long, soft bodies.
-Most of them live in water.
-Their body is divided into segments.