Replies:
They have fine muscles just underneath their skin that contract and cause
them to shorten and lengthen their bodies. The ridges on the outside of
their body help them grip the soil.
PF
Hi Kristen!
the earthworms somehow like the snakes move
by crawling, that is it there are a compressive
force by part of its body against the soil and little
by little each bit of the body moves forward a bit.
Maybe you can try to do that also by yourself:
stay tummy down at the floor of your room and try to
move around stretching and coming back... it is fun!
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