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CH 4 Animals LE 3
| Question | Answer |
|---|---|
| Exoskeleton | An outer skeleton of an organism (I.e Crab) |
| Endoskeleton | An inner skeleton of an organism (I.e. Human) |
| Basic Definition of an Invertebrate | An animal that does not have a backbone |
| 8 Main groups of an Invertebrate | Sponges, Cnidarians, Flatworms, Roundworms, Segmented Worms, Mollusks, Arthropods, and Echinoderms |
| Sponges | Asymmetrical, some specialized cells, no tissues or organs, stay in one place, take food into their body for energy (i.e. Sponge) |
| Cnidarians | Have stinging cells, take food into a central cavity, have radial symmetry, lack organs, and have some tissues (i.e. Jellyfish) |
| Flatworms | Have flat, soft bodies, some have eye spots on their head, (Tapeworms) |
| Mollusks | Soft bodies, protected by a shell, has a mantle, has a foot, has internal organs, has 3 major Groups (Gastropods, Bivalve’s, Cephalopods.) (i.e. Snails) |
| Roundworms | Looks like a smooth, thin tube, has a one-way digestive system (i.e. Heartworm) |
| Segmented worms | Has linked segments connecting parts of their body, the simplest animal with a brain (i.e. Earthworm) |
| Arthropods | Has an outer covering, segmented bodies, and pairs of jointed appendages, and has an exoskeleton (i.e. insect) |
| Echinoderms | Has an Endoskeleton, has a system of fluid filled tubes, have radial symmetry, and move to obtain food and oxygen (i.e. sea urchin) |
Created by:
MS0731
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