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26 Cards in this Set
- Front
- Back
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Cnidaria |
The phylum that includes corals, sea anemones, and jellyfish. |
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Epidermis |
The outer layer that has cells that aid in capturing food and cells that secrete mucus. |
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Gastrodermis |
The inner layer that has cells that produce digestive enzymes and break up food particles. |
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Mesoglea |
The jellylike material between the epidermis and the gastroderm. |
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Gastrovascular cavity |
The central cavity surrounded by the body layers. |
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Polyp |
Body shaped like a hollow cylinder or bag that opens and closes at th top with tentacles around the mouth at the top. |
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Medusa |
Body shaped like an umbrella with mouth and tentacles hanging down in the water. |
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Radial symmetry |
When the body is symmetrical around a central point. |
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Cnidocytes |
Stinging cells. |
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Nematocyst |
A long, coiled, tubular harpoonlike structure. |
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Plankton |
Organisms that cannot swim against a current. |
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Nerve net |
A nervous system consisting of cells with long, thin fibers that connect and respond to mechanical or chemical stimuli. |
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Mechanoreception |
The ability to respond to a stimulus of touch or pressure. |
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Chemoreception |
The ability to respond to chemical stimuli. |
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Photoreception |
The ability to respond to changes in light intensity. |
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Sexual reproduction |
Reproduction through fertilization of eggs by sperm. |
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Larva |
The stage of Cnidaria following fertilization. |
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Cilia |
Small hairlike structures that move the larva along by beating back and forth. |
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Asexual reproduction |
Reproduction without eggs and sperm. |
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Budding |
A form of asexual reproduction where cells on either side of the parent begin to bulge out and form a new organism. |
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Regeneration |
Replacing lost or damaged parts. |
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Hydrozoa |
Hydra, Obelia, Physalia or Portuguese man-of-war |
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Scyphozoa |
Common Jelly, Moon jelly, or Aurelia |
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Anthozoa |
Sea anemones, corals |
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Cnidocil |
The trigger of the cnidocyte. |
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Cubozoa |
Box jelly, Australian stinger. |
