Invertebrates

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Topic:
Name: ____________________________
Date:_________________________
Invertebrates
Objective: - We will be able to identify invertebrates using a dichotomous key.
Questions/Main Ideas:
What is the difference
between an
invertebrate and a
chordate?
Invertebrate: No backbone
Chordate (Vertebrate): Has a spinal cord
Asymmetry: No symmetry exists. Not symmetrical
Example: Sponge
What are the 3 types
of symmetry?
Radial: Symmetrical from all angles, central axis
Example: Coral, Jellyfish
Bilateral: Symmetrical down the middle, right and left halves that mirror each other
Example: Lobster, Humans
What are 2 traits that
some invertebrates
have?
What are the 10 Phyla
in the Animal
Kingdom?
Segmented body- Body parts repeat with the same structural parts
Appendages- A projecting part with a distinct function or appearance
Animal Phyla:
1. Porifera- Sponges
2. Cnidaria- Jellyfish
3. Rotifera- “wheels” ex:
4. Platyhelminthes- Flatworms
5. Nematoda- Roundworms
6. Annelida- Segmented worms, Ex: Earthworms
7. Mollusca- Snail, Octopus, Clam
8. Echinodermata- Starfish, Sea Urchin,
9. Arthropoda- Insects, Lobsters, Spiders
10. Chordata- Birds, Reptiles, Amphibians, Mammals, Fish, etc.
Summary:
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