(A) In $Pheretima$,lymph glands are located on the $4^{th}$,$5^{th}$,and $6^{th}$ segments.These glands produce phagocytic cells.These cells are relea

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(A) In $Pheretima$,lymph glands are located on the $4^{th}$,$5^{th}$,and $6^{th}$ segments.These glands produce phagocytic cells.These cells are released into the coelomic fluid,where they perform the function of phagocytosing (engulfing) harmful bacteria and other foreign particles,thereby protecting the earthworm.