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22 Cards in this Set
- Front
- Back
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Phylum animals slightly more complex than sponges; jellyfish |
Cnidaria |
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Epidermis |
the outer layer of cnidarians |
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Endoderm |
the inner layer of cnidarians, contains calls that produce digestive enzymes and break up food particles |
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Mesoglea |
jelly like material between the two layers |
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Gastrovascular cavity |
extends into the hollow tentacles |
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polyp |
shaped like a hollow cylinder that opens at the top |
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Medusa |
form with the body shaped like an umbrella, the mouth and tentacles hanging down in the water |
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Radial Symmetry |
symmetry around a central axis, as in a starfish or a tulip flower.
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Cnidocytes |
stinging cells |
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Nematocyst |
a long, coiled, tubular harpoon like structure |
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Plankton |
organism that cannot swim against a current |
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Nerve net |
nervous system of cnidarians; consists of cells with long thin fibers that 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 |
bgin production of cells called eggs and sperm |
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Fertilization |
the beginning of a new organism |
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larva |
baby |
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Cilia |
small hairlike structure that move is along by beating back |
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Asexual reproduction |
reproduction without eggs and sperm |
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budding |
like growing a new branch on a tree |
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regeneration |
replacing lost or damaged parts |
