Animal ClassificationAnimal Classification

AnimalsAnimals

Animals are spilt into two major Animals are spilt into two major groups:groups:

VertebratesVertebrates

InvertebratesInvertebrates

InvertebratesInvertebrates

These are animals without a backboneThese are animals without a backbone There are eight groups of invertebratesThere are eight groups of invertebrates

SpongesSponges CnidariansCnidarians Flatworms Flatworms RoundwormsRoundworms AnnelidsAnnelids MolluscsMolluscs ArthropodsArthropods EchinodermsEchinoderms

SpongesSponges

Live in water 5,000- 10,000 known

species Eats by sweeping water into

pores Simplest animal- No nervous

system, tissues or organs Reproduce sexually and

asexually Sessile – stay in one place Asymmetrical symmetry

CnidariansCnidarians

Live in water Approx. 9,000 known

species Tentacles have

stinging cells Simple muscles and

nerves Digestive tract with

one entrance and exit

Radial symmetry

FlatwormsFlatworms

Lives on moist land, water and parasitic

Approx. 12,000 known species

Simple nervous system Digestive tract with one

entrance and exit Reproduce sexually and

asexually Simplest bilateral

symmetrical animal

RoundwormsRoundworms

Lives on moist land, water, and in a host

Approx. 20,000 known species

Simple nervous system

Simple body planComplete digestive

tract with two endsBilateral symmetry

AnnelidsAnnelids

Lives on moist land and in water

Approx. 20,000 known species

Segmented bodyWell-developed organ

systemsComplete digestive

tract with two endsBilateral symmetry

MolluscsMolluscs

Lives on land and in water

Approx. 100,000 known species

Most have a shell Muscular “foot” used

to slide, dig or jump Complete digestive

tract with two ends Bilateral symmetry

ArthropodsArthropods

Lives on land and in water Most abundant phylum > 1 million Segmented bodies Hard exoskeleton Well-developed nervous system Complete digestive tract with two ends Bilateral Symmetry There are four group of arthropods:

InsectsInsectsCrustaceansCrustaceans

Centipedes & MillipedesCentipedes & MillipedesArachnidsArachnids

Arthropods - ArachnidArthropods - ArachnidHave four pairs of Have four pairs of

legs.legs.Have bodies Have bodies

divided into two divided into two sectionssections

Arthropods – Centipedes Arthropods – Centipedes & Millipedes& Millipedes

Have long thin Have long thin bodies and pairs of bodies and pairs of legs on each of legs on each of their many body their many body sectionssections

Arthropods - CrustaceanArthropods - CrustaceanHave five-seven Have five-seven

pairs of legspairs of legsFirst pair often First pair often

used as pincersused as pincersBodies covered Bodies covered

in shellin shell

Arthropods - InsectsArthropods - InsectsHave three pairs of Have three pairs of

legslegsBodies divided into Bodies divided into

three sectionsthree sectionsOften have wingsOften have wings

EchinodermsEchinoderms

Live in the water (Ocean)

Approx. 6,000 known species

Endoskeleton usually covered with spines

Complete digestive tract with two ends

Radial Symmetry

VertebratesVertebrates

These are animals with a backbone.These are animals with a backbone.There are five groups of vertebrates:There are five groups of vertebrates:

FishFishAmphibiansAmphibiansReptilesReptilesBirdsBirdsMammalsMammals

FishFish Lives in waterLives in water

30,000-40,000 30,000-40,000 known speciesknown species

Gills for breathingGills for breathing

Fins Fins

Scales on bodyScales on body

EctothermsEctotherms

BilateralBilateral Symmetry Symmetry

AmphibiansAmphibians

Live in water and on land.Live in water and on land.

Approx.7000 known Approx.7000 known speciesspecies

Breath with lungs and Breath with lungs and through skinthrough skin

Metamorphosis (young Metamorphosis (young live in water, adults live live in water, adults live on land)on land)

EctothermEctotherm

BilateralBilateral Symmetry Symmetry

ReptilesReptiles

Live on landLive on land Approx.10,000 known Approx.10,000 known

speciesspecies Thick skin Thick skin Covered with scalesCovered with scales LungsLungs Lays eggs with Lays eggs with

shellsshells EctothermEctotherm BilateralBilateral Symmetry Symmetry

BirdsBirds

Live on landLive on land Approx.10,000 know Approx.10,000 know

speciesspecies Beak, feathers, wingsBeak, feathers, wings LungsLungs Hollow bonesHollow bones Lays eggs with hard Lays eggs with hard

shell shell EndothermsEndotherms BilateralBilateral Symmetry Symmetry

MammalsMammals

Live on land and in waterLive on land and in water Approx.5,500 know Approx.5,500 know

speciesspecies Mammary glands Mammary glands Hair all over body Hair all over body Large brains Large brains Specialized teethSpecialized teeth LungsLungs EndothermsEndotherms BilateralBilateral Symmetry Symmetry

RiddlesRiddles I live in the waterI live in the water

I have simple muscles and I have simple muscles and nervesnerves

I have radial symmetryI have radial symmetry What am I?What am I?

A Cnidarian

Include 3-4 factsInclude 3-4 facts

about the phylum/class about the phylum/class

(do not use(do not use

invertebrate/invertebrate/vertebrate)vertebrate)

Writingyour Riddles

2 parts to an answer:2 parts to an answer:• Name the phylum/className the phylum/class• Tell if it is a vertebrate or Tell if it is a vertebrate or

invertebrateinvertebrate

Solving others’ Riddles