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Describe labium of cockroach.

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  • The labium of cockroach, also referred to as lower lip, is said to be formed by the fusion of the second pair of maxillae. 
  • Labium has a pair of 3-segmented labial palps on either side which is sensory and help them to choose suitable food.
  • The labium, along with labrum help to hold the food between maxillae and mandible while grinding.

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