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Inverts 1p
Kingdom Animalia. Phylum Cnidaria.
9
Biology
Undergraduate 4
09/29/2009

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Term
Phylum Cnidaria.
Shape?
Definition
Definiate shape, radially symmetrical. Two body forms: polyp and medusa.
Term
Phylum Cnidaria.
Tissue Layers: Living?
Definition
Epidermis and gastrodermis.
Term
Phylum Cnidaria.
Tissue Layers: Mesoglea?
Definition
Gelatinous; supportive; elastic. Internal "skeleton." Acellular or mesenchyme cells.
Term
Phylum Cnidaria.
Muscular Layers: Diploblastic Ectoderm and Endoderm Layers?
Definition
Epithelomuscular and nutritive-muscular cells.
Term
Phylum Cnidaria.
Digestion?
Definition
Have digestive system, but only 1 opening. Gut is gastrovascular cavity, ciliated.
Term
Phylum Cnidaria.
Cnidocytes?
Definition
Secrete organelles: cnidae: nematocysts (many with toxins).
Term
Phylum Cnidaria.
Reproduction?
Definition
Planula larvae: ciliated, motile, non-feeding.
Term
Phylum Cnidaria.
Nutrition?
Definition
Mostly carnivorous; some eat phytoplankton. Some have endosymbionts.
Term
Phylum Cnidaria.
Nerve Network?
Definition
Have muscles and nerves.
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