Phylum Cnidaria Flashcards by Shea Levine

Habitat

Most marine
Some freshwater

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Symmetry

Radial
Diploblastic

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Dipoblatic

Endoderm- gastrodermis
Ectoderm- epidermis

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3 things Cnidarians don’t have

Organ system
Tissues
Circulatory system

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Nutrition

Diffusion for oxygen and food
Incomplete digestive system

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One opening with water circulation for digestion

Gastrovascular cavity

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Cnidocytes

Singing cells in all cnidarians
Releases neurotoxin

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Dimorphic body plan

Mesogela
Polyps (sessile): corals and anemones
Medusa (motile): true and box jellies

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Colonia

Catrozooid- capturing food
Gonozooid- reproduction

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Reproduction

Monoecious and dioecious
Gonozooid

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Senses

Nerve network

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Jelly substance

Mesoglea

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Class Anthozoa

“Flower”
GVC -> septa
Sea anemones and corals

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Scyphozoa

“Cup”
True jellies
Medusa (no velum)

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Cubozoa

“Box”
Box jellies and pedalia

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Hydrozoa

“Water” hydroids
Siphonophores
Medusa (with velum)

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Phylum Cnidaria Flashcards

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