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chapter4L2
animal body plans
| Term | Definition |
|---|---|
| tissue | a group of similar cells that pefrom a specific function |
| organ | a body structure that is composed of different kinds of tissues that work together |
| radial symmetry | a body plan in which any number of imaginary lines that all pass through a central point divide the animal into two mirror images |
| bilateral symmetry | a body plan in which a single imaginary line divides the body into left and right sides that are mirror images of each other |
| describe an animal's body plan | tissues, organs, and organ systems help describe a animals body plan |
| describe how the structures of animals are related to their symmetry | the bodies of animals without symmetry are simply. with some specialized cells but no tissues. in contrast, animals with radial symmetry have complex body plans with tissue and usally with organ systems. animals with bilateral symmetry have organ systems. |
| describe what asymmetrical body type means and give an example of an animal | they have no symmetry example: sponges |
| Describe what radial body symmetry means and give an example of an animal | You know if an animal has radial symmetry because you can draw imaginary lines through a central point to divide into mirror images |
| Describe what bilateral body symmetry means and give an example of an animal | You know if an animal has bilateral symmetry because you can a line to divide it into two halves that our mirror images |
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