What are ver­te­brates?

The Week - Junior - - Animals And The Environment -

There are two types of an­i­mals; ver­te­brates and in­ver­te­brates. Ver­te­brates have back­bones while in­ver­te­brates do not. There are five main groups of ver­te­brates:

Fish:

There are more than 30,000 species of fish in Earth’s oceans, seas, rivers and lakes.

Am­phib­ian:

Cov­er­ing frogs, toads and sala­man­ders, this comes from the Greek word am­phibi­ous. It means “liv­ing a dou­ble life”, to re­flect liv­ing on both land and in wa­ter.

Rep­tile:

This group in­clud­ing crocodiles,

tur­tles and lizards, evolved from am­phib­ians up to

323 mil­lion years ago.

Bird:

Feath­ers are their most ob­vi­ous char­ac­ter­is­tic, dis­tin­guish­ing them from other crea­tures in the an­i­mal king­dom.

Mam­mal:

Around 5,000 species of mam­mal can be found roam­ing our planet.

Rep­tiles evolved from am­phib­ians.

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