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ELL Biology Ch 11
Invertebrates
| Term | Definition |
|---|---|
| vertebrate | an animal with a backbone |
| invertebrate | an animal without a backbone |
| organ system | a group of organs and tissues that work together to perform a certain job |
| symmetry | a body plan that forms mirror images along a line |
| sponge | an invertebrate that lives in water and has many pores in its body |
| cnidarian | an invertebrate with a hollow body and stinging cells |
| parasite | an organism that lives on or inside another organism, usually causing it harm |
| host | an organism that a parasite lives on or in |
| mollusk | an invertebrate with a soft body that may or may not have a shell |
| echinoderm | an invertebrate that has an inner skeleton and rays that extend from a central point |
| regeneration | the ability to regrow lost body parts |
| arthropod | an invertebrate with an exoskeleton and jointed appendages |
| exoskeleton | a tough, stiff covering around the body of an organism |
| appendage | a movable part that extends out from the body, such as arms, legs, wings, and claws |
| thorax | the middle segment of an arthropod's body |
| abdomen | the rear segment of an arthropod's body |
| metamorphosis | the process of change and development that an insect goes through as it becomes an adult insect |
| asymmetry | a body plan that forms no mirror images |
| radial symmetry | a body plan that forms many mirror images |
| bilateral symmetry | a body plan that forms only one mirror images. |
| molting | when an organism sheds its exoskeleton, feathers, or skin |
Created by:
Jesse Wayland
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