Choose the correct option which acts as the upper lip. Which mouth part of cockroach acts as upper lip? (a)Labium (b)Labrum (c)First maxilla (d)Hypopharynx
Option B The mouth parts of cockroach are of biting and chewing type consisting of labrum (upper lip), a pair of mandibles, a pair of maxillae and a labium (lower lip). Within the oral cavity enclosed by the mouthparts, lies a median flexible lobe called hypopharynx (tongue).
