Phylum within Kingdom Animalia

Prorifera

Commonly referred to as Sponges

Have bodies consisting of pores and channels allowing water to circulate

through them

Multicellular with little or no tissue organization

Body is in the form of a sac-like structure consisting of

three layers-The cavity of this

sac is called the spongocoel

No segmentationNo backbone

A matrix of mesophyl acts as an endoskeleton

CnidariaNo segmentation

Common Name Sea Anemones, Corals and

Jellyfish

Body consists of two tissue layers- inner layer lines the gut cavity called the gastrovascular cavity

Lack an endoskeleton and backbone

Exhibit radial symmetry

PlatyhelminthesCommonly referred

to as flatworms

The first organisms to have tissues organized into organs

- 3 major organ systems: nervous system, excretory system, and digestive tract

The first organisms to demonstrate bilateral

symmetry

Lack a body cavity and backbone

No segmentation

No true endoskeleton

Nematoda

Commonly referred to as roundworms

Have 3 layers of tissue that give rise to

organs

Show bilateral body symmetry

No segmentation

Have complete gut (body cavity) that

consists of two openings

Lack a backbone and endoskeleton

Mollusca

Commonly referred to as

mollusks

No segmentation or backbone

Do not possess an endoskeleton

Have a fluid filled body cavity

called a coelom

Show bilateral symmetry

Contain organs derived from

tissue

AnnelidaCommonly called segmented worms

Show bilateral symmetry

Segmented body

Absence of a backbone

Organs derived from organized

tissue

Have a fluid filled body cavity called a coelom

Considered soft bodied organisms therefore do

not have an endoskeleton

Arthropoda

Consists of and commonly called

insects, spiders, and crustaceans

Segmented body plan

Bilateral body symmetry

Have a fluid filled body cavity called a coelom

Lack endoskeleton but do possess an

exoskeleton made of chitin

Lack a backbone

Organs derive from 3 tissue

layers

EchinodermCommonly called

starfish, sea urchins, and sand

dollars

Pentamerous radial body symmetry

Have a fluid filled body

cavity called a coelom

Lack a backbone

Organs derived from 3 tissue levels

Endoskeleton made of calcium

No segmentation in body plan

Chordata

Possess a backbone

AKA “vertebrates”

Segmented body plan

Bilateral body symmetry

Possess a body cavity called a coelom

Body consists of organs and muscles derived

from tissue layersEndoskeleton allows for

muscle attachment