Two sets of muscles are used for locomotion - one set elongates the worm, the other set shortens the worm. Go here for more information about locomotion.
Setae
- tiny bristle-like structures on each segment of the earthworm, except the first and last
- help the earthworm to move and sense the environment
- number and arrangement of setae help identify each species of earthworms
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| http://www.naturewatch.ca/english/wormwatch/resources/anatomy.html |
