Which of the following mouthparts of cockroach are unpaired?

Complete answer: Cockroach is the member of the phylum Arthropoda, class Insecta, order Blattodea, this order also includes termites. Mouthparts of this insect include three appendages, a paired mandibles, a paired maxillae, and an unpaired labium as well as additional head structures; the labrum and the hypopharynx.

Which of the following mouth parts of cockroach is paired?

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).

Is mandible paired in cockroach?

Hint: Cockroaches have mandibles. They are a pair of short structures situated on either side of the mouth. … The cockroach’s mouth consists of a pair of appendages.

Is labrum paired?

The labrum is median, somewhat rectangular flap-like. The mandibles are paired and bear toothed edges at their inner surfaces; they work transversely by two sets of muscles to masticate the food.

Is the tongue of cockroach?

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).

Is Schizocoelom present in cockroach?

Schizocoelom one part is attached to the ectoderm and the other part surrounds the endoderm. The mouth is formed by blastopore. The embryonic gut wall develops Enterocoel in the cockroach and this will be found from Echinodermata to Chordata.

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Why blood of cockroach is called hemolymph?

In cockroaches, the circulating fluid or blood does not flow through the vessels. They come in direct contact with the tissues while flowing in the hemocoel. This is the reason why the blood of cockroaches is called hemolymph.

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