(B) The excretory organs of an earthworm ($Pheretima$ $posthuma$) are segmentally arranged coiled tubules called nephridia. Flame cells are the excret

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(B) The excretory organs of an earthworm ($Pheretima$ $posthuma$) are segmentally arranged coiled tubules called nephridia. Flame cells are the excretory organs in Platyhelminthes. Malpighian tubules are the excretory organs in insects. Skin acts as a respiratory organ in earthworms,not an excretory organ.