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Cnidarian
- Radial symmetry
- No body cavity other than gastrovascular cavity
- diploblastic - 2 primary layers ( endoderm and ectoderm )
- Unique stinging cells
- One opening to digestive track
- Hydrostatic skeleton based on gastrovascular cavity
- more primative
Echinoderm
- Radial Symmetric adults, Bilateral larvae
- Deuterostome developed coelom
- Triploblastic - 3 primary layers ( endoderm, ectoderm and mesoderm)
- Unique water vascular system
- Complete digestive track
- calcareous endoskeleton, supplemented by water vascular system
- More derived
What else can I help you with?
What evolved first cnidarians or echinoderms?
I believe Echinoderms evolved first.
Are seahorses in the echinoderms or cnidarians group?
Cnidaria
Which animal is not a arthopods?
Sponges, Cnidarians, Mollusks, and Echinoderms are not Arthropods.
According to the diagram below which animal class or classes have radial symmetry?
Cnidarians and echinoderms
What are some resources from the ocean floor?
fish, mollusks, worms, crustaceans, echinoderms, sponges, tunicates and other cnidarians
Which animal has radial symmetry?
Cnidarians are true radially symmetrical animals. They include jellyfish. Echinoderms (like starfish) also display radial symmetry. It is important to note that the larvae of echinoderms are bilaterally symmetrical and that Echinoderms evolved from a bilaterally symmetrical group.
What groups of animals have radial symetry?
Echinoderms (ex: starfish), cnidarians (ex: jellyfish) and and some vermiforms have longitudinal radial symmetry.
What cnidarians that are motile?
By swimming using tentacles
What are all of the invertibrate groups?
An invertebrate is an organism that lacks a backbone. The 6 groups of invertebrates are sponges, cnidarians, worms, mollusks, echinoderms and arthropods.
Is a lobster a cnidarian?
no, it is a vegetarian: D
Do cnidarians have spicules?
No, cnidarians do not have spicules. Spicules are small, needle-like structures made of calcium carbonate or silica that are found in some sponges and echinoderms for support and defense. Cnidarians, such as jellyfish and corals, have a different type of support structure called a mesoglea.
Describe the main differences between the polyp form of the cnidarians and the medusa form?
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