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Respiratory System in Cockroach

Which mouth p...

Question

Which mouth part of cockroach acts as upper lip?

A

Labium

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B

First maxillae

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C

Labrum

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D

Second maxillae

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Solution

The correct option is C Labrum
Labrum is a mouth part of cockroach and it acts as a upper lip. Labrum is a broad and flattened terminal sclerite of the dorsal side of head capsule moving articulated to the clypeus. It dorsally overhangs the mouth and is hence referred to as "upper lip".

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