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27 Cards in this Set
- Front
- Back
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Cnidaria |
Phylum including corals, sea anemones, and jellyfish |
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Mesoglea |
The jelly stuff between the epidermis and gastrodermis |
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Gastroderm |
Layer of cells lining the gastrovascular cavity that secrete enzymes ti break up food particles |
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Gastrovascular Cavity |
Central cavity that takes in food and expels waste |
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Basal Disc |
The point at which a polyp forms its sessile connection to a hard surface like a rock |
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Epidermis |
The outer most layer of cells that help capture food and secrete mucus |
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Polyp |
Cnidarians that form sessile attachments and have tentacles and mouth that face up EX: sea anemone |
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Medusa |
Cnidarian that has a mouth and tentacles that face downwards. They are able to swim by pulsing through the water EX: jellyfish |
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Radial Symmetry |
Symmetry in a circular fashion. Allows the organism to capture food in 360 degrees |
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Cnidocytes |
Stinging cells along the tentacles |
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Nematocyst |
Long, coiled, tubular harpoon thing that is inverted inside the cnidocytes that fires when it comes into contact with prey then releases venom into the animals bloodstream |
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Cnidocil |
The trigger on the cnidocyte that senses prey and tells thbe nematocyst to fire |
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Plankton |
An organism that cannot swim against the current |
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Nerve Net |
Thin fibers running along throughout the cnidarian forming a network that responds to mechanical and chemical stimulus |
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Mechanoreception |
The ability for cnidarians to respond to the stimulus of touch or pressure. |
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Chemoreception |
The ability of cnidarians to respond to chemical stimuli |
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Photoreception |
The cnidarians ability to react to changes in lighting |
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Sexual Reproduction |
When the sperm meets the eggs of the female cnidarian. Some cnidarians are able to produce both themselves. |
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Fertilization |
When the sperm and egg successfully join and a new organism starts growing |
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Larva |
New baby cnidarians |
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Cilia |
small hairlike structures that move in a beating pattern that move the larva along |
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Asexual Reproduction |
Reproduction without involving eggs or sperm |
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Budding |
Growing a new identical organism of an already existing one |
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Regenration |
The ability for a cnidarian to grow back damaged or missing cells. They can even regrow into an entirely new organism |
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Hydrozoa |
Ex: Hydra, Obelia, Portuguese Man of War |
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Scyphozoa |
Ex: Moon jellies |
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Anthozoa |
Ex: Coral, Sea Anemone |
