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Classification
• Classified into four main groups• Hydrozoa ( Sea anemones, corals, and jellyfish)
• Scyphozoa ( cup animals and jelly fish)
• Cubozoa (box jellyfish)
• Anthozoa (sea pens, sea fans, blue coral, and black coral sea anemones)
Body Form
• Symmetry is radial• Body forms are polyp and medusa• Skeletal system is mesoglea (endoskeleton) calcium
carbonate (exoskeleton)
•
Reproduction Methods
• Polyps (Produce by asexual budding)
• Sexual reproduction (hermaphroditic)
•
Digestive System
• Gastrovascular Cavity ( nutritive muscle)
• All carnivorous
Circulatory System
• (Heart and Blood Vessels)
Respiratory System
They do not need a respiratory system
Environment
• Lives in Aquatic environments
• Mostly Marine
Interactions
• Have stung people
• They only sting if they disturb them
• Over the past six years in Queensland only 1100 cases of jellyfish stings.
Unique Features
• The mouth is surrounded by tentacles studded with microscopic stinging capsules known as nematocysts that are the agents of offense and defense.
• Cnidarians are diploblastic -- that is, the body and tentacles consist of two cell layers
• Come in a ton of different shapes and sizes
Thank You
• Thank you for watching this power point on cnidaria
• Thank you to Mrs. Tabor the awesomest Science teacher in the world
• Go seventh period!!!!!
Internet Sites
• http://animaldiversity.ummz.umich.edu/site/accounts/information/Scyphozoa.html
• http://jellieszone.com/cubozoa.htm• http://science.jrank.org/pages/3477/Hydrozoa.html• http://tolweb.org/Anthozoa• http://www.kn.sbc.com/wired/fil/pages/listjellyfisli.html
•
http://animals.about.com/od/cnidarians/ss/cnidarians.htm•