INVERTEBRATESINVERTEBRATESANIMALS WITHOUT BACKBONE.

PORIFERA

SPONGE

The common name is: Sponges.

●Pores.

●Osculums.

●Choanocytes.

Their body is soft.

CNIDARIA

JELLYFISH

The common name is: Jellyfish or polyps.

●Stinging tentacles.

They live in colonies.Their body is like an umbrella or a sack.

ANNELIDS

WORM

●Clitelium.

We find three groups:-Polychaetes.-Tubifidis.-Hirudinea.

MOLLUSCS

SQUID

They have a shell that protects themselves

We find three groups:-Gastropods.-Cephalopods.-Bivalves.

ARTROPODS

BEE

Their body is divided in: head, thorax and abdomen.

We find:-Crustaceans.-Myriapods.-Arachnids.-Insects.

CRUSTACEANS

SHRIMP

Their body is divided in: cephalothorax and abdomen.

They have two legs on each segment.They can have a telson.

MYRIAPODS

ESCOLOPENDRA

Their body is divided in: head and trunk.

They have one or two pairs of legs on each segment.

ARACHNIDS

SPIDER

Their body is divided in: cephalothorax and abdomen.They have eight legs, four in each side.They also have cheliceare.

INSECTS

BUTTERFLY

Their body is divided in: head, thorax and abdomen.They have six legs, three in each side.And they can have wings.

ECHINODERMS

STARFISH

●Ambulacral system.●Internal skeleton.

http://www.youtube.com/watch?v=fohfN7HmIxg

INTERESTING THINGS

http://www.youtube.com/watch?v=A100m5EpfFI

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