Phylum Cnidaria Flashcards

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1
Q

what are the classes of phylum cnidaria? (there are 4)

A

Hydrozoa (hydra, obelia, portugese man o war)

Anthozoa (coral, anemones)

Cubozoa (Box jellies)

Scypozoa (true jellies)

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2
Q

what are general characteristics of phylum cnidaria? (There are 5)

A
  1. cnidocytes (with nematocyst)
  2. radial symmetry
  3. tissue-level development- diploblastic
    a) body two cell layers thick
    b) epidermis-mesoglea-gastrodermis
  4. gastrovascular cavity (mouth and anus are the same)

5.two body forms: polyp/medusa

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3
Q

Body form of cnidaria?

A

Polyp: usually cesil, has radial symmetry, oral and aboral

Medusa: Oral surface down. Mobile

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4
Q

Cnidaria Reproduction

A

Both sexual and asexual

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5
Q

What are cnidaria?

A

Stinging organisms. Have cnidocytes, which are modified epidermal cells that sting and have nematocyst

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