Yes it is made up of chitin as to protect its roach's this is hard so it can protect the body as it is a exoskeleton (which is the outer part of the cockroach body.)

Exoskeleton of cockroach is made up of chitin.

The exoskeleton of a cockroach is the hard outer covering that provides protection and support for the insect's body. It is composed primarily of a substance called chitin.

Chitin:
Chitin is a complex carbohydrate that is found in the exoskeletons of arthropods, such as insects, crustaceans, and arachnids. It is a strong and flexible material that provides rigidity and strength to the exoskeleton.

Structure of the exoskeleton:
The exoskeleton of a cockroach is made up of multiple layers. The outermost layer is called the cuticle, which is a thin, waxy layer that helps to prevent water loss and protect against physical damage. Beneath the cuticle is the epicuticle, which is a thin, transparent layer that provides additional protection.

The main bulk of the exoskeleton is made up of the procuticle, which is divided into two layers: the outer exocuticle and the inner endocuticle. The exocuticle is the harder and more rigid layer, while the endocuticle is softer and more flexible. Both layers are composed of chitin fibers embedded in a matrix of proteins.

Functions of the exoskeleton:
The exoskeleton serves several important functions for a cockroach. It provides protection against predators and physical damage, as well as support for the internal organs. It also helps to prevent desiccation by reducing water loss from the body.

Growth and molting:
As the cockroach grows, it needs to shed its old exoskeleton and form a new one. This process is called molting. During molting, the old exoskeleton is shed and a new, larger exoskeleton is formed underneath. The new exoskeleton is initially soft and flexible, but it hardens and becomes rigid over time.

In conclusion, the exoskeleton of a cockroach is primarily composed of chitin, a complex carbohydrate. It provides protection, support, and water conservation for the insect's body. The exoskeleton is periodically shed and replaced through the process of molting.