kingdom animalia: classification

Backbone ● Animals are classified at the first level by the presence of a backbone: those with backbones are called vertebrates those without are invertebrates. ● Most of the lower animals are invertebrates and include a range of soft-bodied animals ranging from plantlike Porifera and worms through through “spiny-skin ned” Echinodermata to Arthropoda. The Arthropoda ● The arthropods do not possess bones but do have a hard structure surrounding their bodies called an exoskeleton. The most successful group of arthropods are the insects, which have three pairs of jointed legs and a segmented body divided into three parts: head, thorax, and abdomen. The vertebrates ● Almost all large animals are vertebrates and have a well-developed backbone and a complex nervous system. Vertebrates are also called Chordata. ● The most primitive chordates are the cartilaginous fish (the Chondrichthyes), which do not possess true bone but rely on tough cartilage. The most well-known species in this group are the various types of shark. ● Mammals are the most successful group and are warm-blooded, possess fur, give birth to live young, and feed them on milk produced by the mammary glands. Kingdom Animalia: classification abdomen exoskeleton invertebrate thorax vertebrate Key words © D i a g r a m V i s u a l I n f o r m a t i o n L t d . Tree diagram of Animalia Porifera Coelenterata Platyhelminthes Nematoda Annelida Mollusca Echinodermata Arthropoda Insecta Crustacea Chilopoda and Diplopoda Arachnida Chondrichthyes Osteichthyes Amphibia Reptilia Mammalia Aves Chordata Animalia

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Kingdom Animalia: Classification

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Backbone Animals are classified at the first level

by the presence of a backbone: thosewith backbones are called vertebratesthose without are invertebrates.

Most of the lower animals areinvertebrates and include a range ofsoft-bodied animals ranging fromplantlike Porifera and worms throughthrough spiny-skinnedEchinodermata to Arthropoda.

The Arthropoda The arthropods do not possess bones

but do have a hard structuresurrounding their bodies called anexoskeleton. The most successfulgroup of arthropods are the insects,which have three pairs of jointed legsand a segmented body divided intothree parts: head, thorax, andabdomen.

The vertebrates Almost all large animals are vertebrates

and have a well-developed backboneand a complex nervous system.Vertebrates are also called Chordata.

The most primitive chordates are thecartilaginous fish (theChondrichthyes), which do notpossess true bone but rely on toughcartilage. The most well-known speciesin this group are the various types ofshark.

Mammals are the most successfulgroup and are warm-blooded, possessfur, give birth to live young, and feedthem on milk produced by themammary glands.

Kingdom Animalia:classification

abdomenexoskeletoninvertebratethoraxvertebrate

Key words

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Info

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Ltd.

Tree diagram of Animalia

Porifera

Coelenterata

Platyhelminthes

Nematoda

Annelida

Mollusca

Echinodermata

Arthropoda

Insecta

Crustacea

Chilopodaand Diplopoda

Arachnida

Chondrichthyes

Osteichthyes

Amphibia

Reptilia

Mammalia

Aves

Chordata

Animalia