Anatomy of a Cockroach with Picture

Anatomy of a Cockroach

The word “cockroach” is derived from the Spanish word for cockroach, cucaracha. The name is also spelled ‘cucarache’ in English. The scientific name of cockroach is Blattodea. This vernacular name refers to any of the species belonging to the order Blattodea. A cockroach has a flat, oval-like shape. It is about 3 cm in length and 2 cm in width. It has a color that ranges from dark brown to light brown. It also has a pair of long, thin antennae that are used to smell, touch and feel.

Cockroaches are the most resilient and creepy insects in the world. Do you know Cockroach Internal Anatomy structure is made so that they can live nearly one week or more without the head? Therefore, it is necessary to know about roach anatomy and working system.

So if your suitable house gets infested by cockroaches, it will be beneficial for you to know about roach anatomy. But it sounds like creaky right? But believe us by understanding roach anatomy, you will help you to determine about pests types and the correct solution to be taken — details of look at more info on our other page.

Cockroach Body Parts

The head of the cockroach houses its brain which has sensors that help them detect light they have two antennae that work as sense organs to help them identify food sources and other things around them by sensing chemicals or air currents from what direction they come in.

The mouth contains their mandibles which are used for biting into solid foods like plants, dead animals, etc.. They also use their tough outer shell called “cuticle” to protect themselves from predators such as cats or dogs . Cockroach are mostly nocturnal which means they are active at night and will stay hidden during the day.


Head includes a long pair of antenna, brain, substantial mouthparts, and compound eyes. The antenna helps for smelling, and vibrations, Brain used for sensing, for eating and chewing food mouthparts used and eyes have a poor vision at daytime and works powerfully at night time. That way, the cockroach is the nocturnal insect. Internal anatomy of cockroach.


Thorax consists of 3 pairs of legs, two pairs of wings and a plate behind the head. They can move around with short spiky legs, and most adult roach have wings for the fly.


By the name you can understand it is the lower part of the roach body which mainly consist of reproductive and nerve system. These are the internal parts of a cockroach body.

How do the cockroaches breathe?

Out of 4500 spices in the world, a cockroach can breathe differently. They do not need the head for breathing. Therefore they breathe through an internal tube process is called tracheae. This tracheae system brings oxygen directly to the cells. For this reason, they are even independent of mouth breathing.

Do cockroaches have a brain?

We have already given you the roach head information that it can live without the head for a week. But do you ever think about how this could be possible? Yes. This is possible because they can survive through a decapitation system which human cannot.

As cockroaches are cold-blooded and their brains do not control blood pressure and breathing system, they do not even utilize their brains. They stay quiet and sit around and dead only after affected by the bacteria or virus. Also, check out the life cycle of a cockroach with diagram.

Are cockroaches clean?

This is the common question to all sufferers as it stays in a dirty dark place spreader of disease. However, you will be amazed to know that roach-like to keep clean them all the time. Though they like to live in a warm, humid place, they maintain cleanness.

Why cockroach never die?

As the roach breathing system is not dependent on the mouth or brain they never die. But they died on their backs. Because when any insecticide is used it directly affects their nervous system which creates muscular spasms and it flips on its back.

Finally, this is all about cockroach anatomy and how their central body part works. Although this is a concise discussion, to remove cockroaches dramatically, it is the secret weapon.

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