invertebrates alvaro

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Page 1: Invertebrates alvaro

THE INVERTEBRATES

Page 2: Invertebrates alvaro

The main characteris of invertebrates is that they haven´t got a spinal colum or an internal skeleton.

Page 3: Invertebrates alvaro

Invertebrates have got different body coverings:Some invertebrates, like crabs and

oysters,have got a hard shell to protect themselves.

Other invertebrates, like ants and beetles, have got a rigid covering called an exoskeleton.

Some invertebrates, like worms, have got a soft body withouth protection.

Page 4: Invertebrates alvaro

Main grops of invertebrates.Mollusk have got a hard shell.Jellyfish and polyps have got long tentacles.Sponges have got soft body with holes

called pores.Echinoderms are covered with sarp spikes.Arthropods have got exoskeleton and

jointed legs.Annelids: They´ve got logn, soft body that

is divided into rings.

Page 5: Invertebrates alvaro

ArhtropodsInsects have got six legs.Three main parts

head, thorax and abdomen.Arachnids have got eight legs.Two main

parts cephalothorax and abdomen.Crustaceans have got ten legs.Two main

parts cephalothorax and abdomen.Myriapods have got many legs and two main

parts the head and the trunk.

Page 6: Invertebrates alvaro

MollusksBivalves:Hva got a shell with two parts

called valves.Gastropods:Have got spiral shell.Other

gastropos haven´t got spiral shell.Cephalopods:Have got a long arms to catch

their food.

Page 7: Invertebrates alvaro

FinishBy AlvaroESPERO QUE OS HAYA GUSTADO. SALUDOS ALVARO.