This Kingdom is characteristics by:
1. Multicellular Body
2. Heterotrophic Nutrition
3. Movement


Classified by these marjor critera:
Symmetry
Level of Tissue Organization
Germ Layers
Coelum
Body Plan
Blastopore

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Phylum Cnidaria

Jellies, Hydra, and Coral
Symmetry: radial
Level of Organization: tissue
Germ Layers: ectoderm and endoderm
Coelom: none
Body Plan: saclike, single opening

2 body forms:
Medusae
Polyp

see first stage of nervous tissue called nerve net, used for movement
Examples: coral = dead polyp secretes calcium carbonate

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Phylum Nematoda

Roundworms
Symmetry: cylindrical, bilateral
Level of Organization: organ system
Germ Layers: ectoderm, endoderm, and mesoderm; ceolomate
Coelom: pseudocoelom (false)
Body Plan: tube with in a tube
Images Ascaris Lumbricoides from http://www.dpd.cdc.gov/DPDx/html/ImageLibrary/Ascariasis_il.htm Vinegar eel

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Phylum Platyhelminthes

Flatworms
Have mouth, cells with specific jobs, independent organs, beginnings of smelling and seeing, beginnings of brain

Symmetry: bilateral
Level of Organization: organ
Germ Layers: ectoderm, endoderm, and mesoderm; ceolomate
Coelom: none
Body Plan: saclike

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Phylum Porifera

Sponges
Symmetry: asymmetrical or radial
Level of Organization: cellular, no true tissue or organs
Germ Layers: none
Coelom: none
Body Plan: none

It can re-grow if a part is cut off
Have spicules instead of skeleton (slide)