How does the differentiated mesoderm in Planaria facilitate its movement?

Question

How does the differentiated mesoderm in  Planaria  facilitate its movement?

Answer

The longitudinal muscle is contracted laterally to allow it to wiggle forward.

Answer

The cilia rhythmically beats the water to allow it to swim forward.

Answer

The longitudinal muscle and circular muscle are contracted alternately to allow it to move forward.

Answer

The simple muscle is contracted and elongated to allow it to move forward.

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