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25 Cards in this Set
- Front
- Back
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What type of symmetry do Cnidarian have? |
Radial |
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Do Cnidarians have a complete digestive system? |
No, they have a gastrovascular cavity which work as a mouth and anus |
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How many germ layers do Cnidaria have? |
2 (Dipoblastic) |
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Cylindrical form which adheres to the substratum by the aboral end of the body stalk and extends tentacles around the oral end to contact prey |
Polyp |
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Flattened, oral opening down, bell shaped form; moves freely in water by passive drifting and weak bell contractions; tentacles dangle from the oral surface which points downward. |
Medusa |
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What classes are in the subphyla Medusozoa? |
Hydrozoa, Scyphozoa, Cubozoa |
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Cnidaria's nervous system? |
Nerve net |
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A stinging cell |
Cnidae |
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Cnidae collectively refered to as in Cnidaria |
Nematocysts |
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What are the two stages of the lifestyle of Cnidaria called? |
Polypoid stage and Medusoid stage |
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What are the three layers of the Cnidarian? |
Ectoderm Mesoglea Endodoerm |
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Name 2 sesnsory organs (Rhopalia) |
Statocysts: balance Ocelli: light |
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Class: Simplest body form with dimorphic lifestyle asexual polyp, sexual medusa Portuguese Man of War |
Class Hydrozoa |
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Class: True jellyfish with dominant medusoid stage Lion's mane jallyfish |
Class Scyphozoa |
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Class: largely restricted to the tropics. Tentacles protrude from each 'corner' complex eyes Box jellyfish |
Class Cubozoa |
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Class: flowerlike polyps, no medusa Corals, anemones |
Class Anthezoa |
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Class: no medusa, sexual polyps Stalked jellyfish |
Class: Staurozoa |
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Locomotion through... |
Velum: pushing out Epitheliomuscular Cells Hydrostatic Skeleton |
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Developmental stages |
1. Larva 2. Poylp 3. Medusa |
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Examples of Epitheliomuscular celss |
Longitudinal fibers: epidermis Circular fibers: gastrodermis |
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Portugese Man of War Hydrozoa |
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Sea Anemone Anthozoa |
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Moon Jellyfish Scyphozoa |
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Box jellyfish Cubozoa |
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Stalked Jellyfish Staurozoa |
