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Ascut
Ascut
12 years ago

The worm moves on the sole of its musculosed foot crawling. The mucus separated by glands facilitates the progression: The worm slides over the ground and leaves a shiny track. If you want to observe the movement mechanism, you can simply crawl the screw over a glass pane. It is then possible to see the contraction waves which extend forward from the rear end of the foot.

Source: http://www.sonnentaler.net/documentation/paed/wie/content-teaching/grinding/screws.html

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Aaliyah71
Aaliyah71
12 years ago
Reply to  Ascut

I would like to add a little to the answer:

There are also snails that have a somewhat different kind of movement, for example the Pomatias elegans, the beautiful land lid snail.

Here you will find pictures and also a video about the movement of these animals:
http://www.softtiere.at/Schnecken/land/pomatiidae.html

The extract from the website:

The movement of the land lid screws, which clearly differs from that of a lung screw, as the vineyard screw, for example, introduces, is also particularly important. In contrast to a lung auger, which places its entire foot sole in wave-like movements and thus moves forward, land lid augers move so to speak “two-footed”: They alternately set the left and right longitudinal half of the foot forward.

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Jenisa13
Author
Jenisa13
12 years ago

Hey, thanks to her two. I really need to know that for school.thx
Jenisa

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