Monday, February 26, 2007


phylum Platyhelminthes
Free-living flatworms use cilia on their epidermal cells to help them glide through the water and over the bottom. Muscle cells are controlled by the nervous system which can help flatworms to twist and turn in their environment.

phylum Nematoda
The muscles help roundworms to move like a snake and their bodies can contract and push their way through the soil by thrashing around.

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