Exoskeleton of Cockroach and Other Insects

Exoskeleton is the outer hard covering of the body of invertebrates. Cockroach and other insects have exoskeleton made up of chitin. Let's understand what chitin is and how it forms the exoskeleton of cockroach and other insects.

Chitin

Chitin is a complex polysaccharide that forms the main component of the exoskeleton of arthropods such as insects, crustaceans, and arachnids. It is also found in the cell walls of fungi and the beaks of cephalopods. Chitin is a linear polymer of N-acetylglucosamine (GlcNAc) joined by β-1,4 linkages. It is a tough and insoluble material that provides structural support and protection to the organism.

Exoskeleton of Cockroach and Other Insects

The exoskeleton of cockroach and other insects is made up of several layers of chitin. The outermost layer is called the epicuticle, which is a thin, waxy layer that prevents water loss and protects against pathogens and predators. The epicuticle is also responsible for the coloration of the insect. The middle layer is called the procuticle, which is a thick layer of chitin that provides structural support and protection. The procuticle is composed of two layers, the exocuticle and the endocuticle. The exocuticle is the outer layer of the procuticle and is heavily sclerotized, which means it is hardened by the deposition of protein. The endocuticle is the inner layer of the procuticle and is relatively softer and more flexible.

The exoskeleton of cockroach and other insects is shed periodically through a process called molting. During molting, the old exoskeleton is shed, and a new one is formed. The process of molting is controlled by hormones, and it allows the insect to grow and repair any damage to its exoskeleton.

Conclusion

In conclusion, the exoskeleton of cockroach and other insects is made up of chitin, which is a tough and insoluble polysaccharide. The exoskeleton provides structural support and protection to the organism, and it is shed periodically through a process called molting.

Chitin...coz they belong to arthopoda...in which body is covered by chitinous exoskeleton....