Download Guided Notes- Cnidaria and Ctenophora

UNIT 8 Guided Notes- Cnidaria and Ctenophora
RADIATA-animals with radial symmetry
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__________________________________________________________________
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Cnidarians are animals with __________________________________________
BODY STUCTURE
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__________________symmetry
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_______________ organ systems
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Nerve net (primitive ___________________)
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Outer membrane, inner membrane and jelly middle called ___________________
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Whole body responds no matter what was stimulated
Oxygen ____________________ its body, CO2 _____________________
Have sensory organs
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_________________________________________
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Box jellies have ____________________________
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Primitive muscle cells- ____________________________
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____________________digestive tract- one opening for waste and food
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Lack ______________________________ and no body cavity
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Do have hormones to communicate between cells
REPRODUCTION
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Some Cnidarians have an alternation of generations:
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__________________is the _______________body plan
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__________________ is the _______________body plan
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Larvae is called _________________________________
FEEDING
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Cnidoblasts / nematocysts –________________________________
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Used in _________________ and to __________________________ prey
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After being triggered these cells cannot be re-used so
________________________________
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Planktonic version are carnivorous, sessile version are filter feeders
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Food is digested in the _______________________________________
TAXONOMY
Class Hydrozoa – _____________________________
Class Anthozoa -______________________________
Class Cubozoa - ______________________________
Class Scyphazoa - _____________________________
Class Hydrazoa
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Examples: Portugeuse Man O War, Hydra
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Dominant phase is ___________________________
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Found as ____________________ animals or ___________________
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Individuals of a colony cannot exist on their own
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Different polyps have different roles
o ____________________ polyps
o ____________________ polyps
o Special __________________________polyps
o ________________________polyps
Class Anthazoa
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Sea Anemones
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Live as a ______________________attached to the substrate
Coral
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Colonial polyps with a _________________________________________
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Polyps share a ______________________
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____________________________________________________________
____________________________________________________________
____________________________________________________________
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Build reefs using Ca in the water and CO2 from their algae
Class Scyphazoa
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Spend most of their life as umbrella shaped medusa
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Size range from cms to meters across
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Typical NJ jellies-___________________________________________________
______________________________________________________________________
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Population explosions of 100s or 1000s of these animals is currently a concern
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Major predators include tuna, swordfish, moonfish, triggerfish and certain kinds
of ____________________________________________
Class Cubazoa
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More square shaped than regular jellies
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Powerful stings that can kill a human
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_______________________________________________________________
Ecology
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Important predators
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Corals are _________________________________________________ in the
ocean
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Important food source for some animals
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Huge blooms are occurring recently because of __________________________
______________________________(??) or because of
_____________________(???)
Phylum Ctenophora
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Common name…______________________
Unique Characteristics
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Comb plates (______________________)
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Medusa stage only
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____________________________________________
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Position of paired tentacles changes symmetry to ______________________
Ecology
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Form a large percent of the ______________________
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Can ______________________ depending on damage
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Feed on ______________________ including: larvae, worms, jellyfish, other
comb jellies, and sometimes small fish.
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Same predators as jelly group
How Ctenophora are Different from Cnidarians
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No alternation of generations (______________________)
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No ______________________ have sticky cells instead
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Biradial symmetry, two tentacles
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____________________________________________
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Complete digestive system
How Ctenophora are Similar to Cnidarians
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__________________________________________________________________
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__________________________________________________________________
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Similar role in marine oceans