Which structure in cockroach is non Chitinous?

Chitin absent in labrum mouth part of cockroach.

Which of the following part of cockroach is unpaired?

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. Galea and lacinia form parts of the maxillae.

Which part of gut of cockroach contains Chitinous teeth?

The oesophagus opens into a sac-like structure called the crop that stores food. The gizzard is the next structure that is present after the crop. It is also called the proventriculus. It helps in grinding the food particles due to the presence of six chitinous plates called teeth.

How many Chitinous plates are present in gizzard of cockroach?

Gizzard or proventriculus is the part of alimentary canal of cockroach has an outer layer of thick circular muscles and inner cuticle forming six highly chitinous plate called teeth.

Do cockroaches have chitin?

Chitin is a complex macromolecule, AKA a polymer. Chitin can be found in crustaceans, such as crabs, lobsters, and shrimp. It can also be found in insects, worms, fungus (or is it fungi?) and mushrooms.


Fungi 5-20%
Cockroaches 35%
Water Beetle 37%
Silk Worm 44%
Hermit Crab 69%
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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).

What is the role of hypopharynx in cockroach?

The maxillae in cockroaches are paired and serve the primary function of tasting food. The hypopharynx is closely associated with salivary glands and functions as the tongue that helps in the movement of food in the preoral cavity.

Does cockroach have a stomach?

After entering the stomach of the cockroach, food is broken down by enzymes present within the gastric caecea and in the middle of the intestines is the mid-gut, which is responsible for nutrient absorption. Spiracles are visible on the sides of the cockroach’s body; these are used for breathing.

Why is cockroach important in day to day life?

Cockroaches are very important in humans day to day life because cockroaches are professional recyclers. Cockroaches contain protozoa bacteria in their digestive systems. This will help to convert the waste into easily absorbed nutrients. This is the main task for cockroaches in day to day life.

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