In Pheretima,locomotion occurs with the help | vedclass

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(C) In $Pheretima$ (earthworm),locomotion is achieved through the coordinated action of the body wall muscles and the setae.$1$. The body wall contain

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Longitudinal and circular muscles and setae

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(C) In $Pheretima$ (earthworm),locomotion is achieved through the coordinated action of the body wall muscles and the setae.$1$. The body wall contains both circular and longitudinal muscles.$2$. Contraction and relaxation of these muscles cause changes in the body shape,allowing the earthworm to move.$3$. Setae,which are $S$-shaped chitinous structures embedded in the epidermal pits of each segment (except the first,last,and clitellum),act as anchors to provide grip against the substrate during movement.$4$. Therefore,the combined action of longitudinal muscles,circular muscles,and setae facilitates locomotion.

In $Pheretima$,locomotion occurs with the help of ..........

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