Which Organ Is Called Second Brain In Human Body? Find Out Its Role

The human body is a complex organ, yet each part does its own important task. One helps you in breathing, another helps you digest food, while others store memories or pump blood around. But did you know something is surprising inside our body- there’s an internal organ that is so intelligent and works independently like the brain. This organ is so clever that experts sometimes call it a second brain. It sends messages, reacts to changes, affects how you feel emotionally, and shapes your well-being - all without you needing to think about it.

Researchers have been studying this organ for many years, and have found it’s packed with millions of nerve cells, runs its own communication network, while having large connections to your mood and immunity. Oddly enough, it also affects how you feel daily - like when you’re stressed, cheerful, energetic or tired. Its functions are so powerful and complex that experts call it the body’s “second brain.”

Getting to know this part of your body - and how it works - can boost both your mood and energy. Here’s a quick look at what the gut brain actually means, plus why it plays such a big role in daily life.

Which Organ Is Called the Second Brain?

The digestive system, or gut, is referred to as the "second brain." This is due to the enteric nervous system (ENS), which is made up of over 100 million nerve cells and functions virtually independently of the brain.

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Why the Gut Is Known as the Second Brain

1. Has Its Own Nervous System

The enteric nervous system of the gut is self-sufficient. Without the brain's guidance, it manages chemical reactions, food metabolism and digestion.

2. Communicates With the Brain

The gut talks to the brain - what's called the gut-brain axis. How you feel emotionally can shift based on signals from your digestive system, while pressure or anxiety might also alter how your gut works.

3. Produces Important Hormones

Nearly 90% of your body’s serotonin - often called the “happy hormone” - comes from the gut, so it plays a big role in how you feel emotionally.

Important Functions of the Second Brain (Gut)

Digestive Functions: It absorbs nutrients, breaks down food, and regulates bowel movements.

Mental and Emotional Functions: It impacts stress, mood, and uses hormone balance to help control sleep.

Immune Functions: The gut contains beneficial bacteria, shields the body from infections and boosts immunity.

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Amazing Facts About the Gut

1. There are more gut bacteria in your body than human cells.

2. Concentration and memory are enhanced by gut health.

3. Chronic fatigue, anxiety and depression are all associated with poor gut health.

4. Consuming foods high in fibre directly improves gut function.

How to Keep Your Second Brain Healthy

Consume probiotic-rich foods like yoghurt, curd, and fermented foods. Cut back on sugary and junk food. Make sure you get enough water. Rest well. Use exercise and meditation to reduce stress.