Chickens and cockroaches can survive for days without a head; but how is this possible?

In nature, many intriguing mysteries remain generating debate, and one of them concerns the remarkable ability of chickens and cockroaches to survive for days after decapitation.

Although it seems like a horror story, science reveals that this survival is linked to nature decentralization of their nervous systems and the ability to maintain reflexes and functions for a short period without the brain.

What does science have to say about this phenomenon?

The explanation for this phenomenon lies in the peculiar anatomy of these animals. Unlike humans, many insects do not have a nervous system centered in the brain.

Instead, they have a collection of nerve ganglia throughout their bodies. This allows vital functions such as breathing and paw movements to continue even after the head is removed.

Survival after decapitation is also supported by neural reflexes that do not depend on the brain, being limited solely to a certain part of the brain.

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For example, if someone touches the leg of a decapitated cockroach, it can still move it thanks to the nerve ganglia in this region, which can generate automatic responses.

(Image: unsplash)

Another crucial factor is the way these animals control their breathing. Chickens and cockroaches have openings called spiracles throughout their bodies, responsible for regulating the entry of oxygen.

Even in the absence of the brain, these holes maintain their primary function, allowing passive breathing, which maintains the supply of oxygen to the body.

Furthermore, both species store a considerable amount of energy in their bodies in the form of glycogen and other substances. This sustains their vital functions for a short period after decapitation.

So what kills these animals after decapitation?

The answer is simple: lack of food and water is what ultimately leads to the death of these animals after decapitation. The absence of the head prevents the intake of food and liquids, and energy reserves end up being depleted.

It is important to note that the ability to survive after decapitation can vary between individuals and depends on factors such as the animal's age, health and general condition.

And of course, although it is a fascinating curiosity of the animal kingdom, decapitation is still a lethal experience for these living beings.