Phylum characters

Porifera Defining characters

Aquiferous system & choanocytes

Porifera tissue type

No true tissue

Porifera coelom

Acoelomate ( lack true body cavity)

Porifera symmetry

Asymmetry ( lack body plan or symmetry)

Porifera cephalization

none

Porifera circulatory system

none

Porifera excretory system

none

Porifera life style / location

Sessile and Aquatic environments

Porifera structural support

Ctenophora defining characters

Comb plates and colloblast

Ctenophora tissue type

Diploblastic

Ctenophora coelom

Acoelomate ( lack true tissue)

Ctenophora symmetry

Biradial symmetry

Ctenophora cephalization

none, have net nerve

Ctenophora circulatory system

none

Ctenophora excretory system

none

Ctenophora lifestyle/location

Marine, planktonic carnivores

Ctenophora structural support

Ciliary plates and muscles

Cnidaria defining characters

Stinging cells and two body forms

Cnidaria tissue type

Diploblastic

Cnidaria coelom

Acoelomate ( lack true tissue)

Cnidaria symmetry

Radially symmetry

Cnidaria cephalization

none

Cnidaria circulatory system

none

Cnidaria excretory system

none

Cnidaria lifestyle/location

Sessile polyp and motile medusa ; marine environments

Cnidaria structural support

Hydrostatic and mesoglea

Platyhelminthes defining characters

Mostly parasitic and few free-living

Platyhelminthes tissue type

Tripoblatic

Platyhelminthes coelom

Acoelomate ( lack true tissue)

Platyhelminthes symmetry

Bilateral symmetry

Platyhelminthes cephalization

Yes- some have eye spots

Platyhelminthes circulatory system

none

Platyhelminthes excretory system

Protonephridia

Platyhelminthes lifestyle/location

Some species are free-living carnivores in aquatic or moist terrestrial environments, while others are parasitic, living on or in other animals. 

Platyhelminthes structural system

Muscles and parenchyma