SCIENCEPRESENTATION

Created by:

Gerard Casacuberta MoragasLluís Pla Vilabella

The invertebrates are animals without backbone with intern skeleton

INVERTEBRATESPORIFERA

CNIDARIA

ANELLIDS

MOLLUSCS

ARTHROPODS

ECHINODERMS

JELLYFISHES

POLYPS

POLYCHAETES

TUBIFIDS WORM

HIRUDINEANS

GASTROPODS

CEPHALOPODS

BIVALVES

CRUSTACEANS

MYRIAPODS

ARACHNIDS

INSECTS

The porifera are aquatic animals that they can filter water with two little holes that are called osculums.

Cnidaria are invertebrates that present tentacles with stinging cells.

Cnidaria are divided in 2 groups: The jellyfishes and polyps.

They have stinging cells in their tentacles they also have an umbrella form in their bodies

They live in colonies and they present stinging cells. Their body form is like a sack

Annelids are aquatic and land animals. They are divided in 3 groups.The Polychaetes, the Tubifids worms and the Hirudineans.

They can present setae and clitel.

Polychaetes are annelids with setae

Tubifids worms are annelids with clitel and setae

Hirudineans are annelids with clitel

The molluscs have got a soft body and are protected by a shell.They are divided in 3 groups: gastropods, cephalopods and bivalves

The gastrophods have a prominent head and a highly developed shell

The cephalopods have the head and feet highly developed

Bivalves have got two valves

The arthropods are terrestrial and aquatic animals.They are divided in 4 groups: crustaceans, myriapods, arachnids and insects.

Their body is generally divided into three parts: head, thorax and abdomen.

They have two antennae and two jaws and the four maxillary

They are terrestrial arthropods with body divided in two parts: cephalothorax, abdomen

They have three body parts: head, thorax and abdomen.They have three pairs of legs and usually two pairs of wings.

The echinoderms are marine animals and they move slowly through the rocks, sand, etc.

CURIOSITIESThe ants allow other species to survive: fan and remove the soil, spread seeds and eat some, enriching the fertility of

soil which is almost deserted.