10 Fascinating Facts About the Human Brain

Jake the Curious
6 min readJan 1, 2023

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Photo by Robina Weermeijer on Unsplash

As the most complex organ in the human body, the brain is an amazing and mysterious organ that controls all of our thoughts, actions, and experiences. In this article, we will explore 10 fascinating facts about the human brain that will leave you amazed and intrigued.

From the size and complexity of the brain to its ability to regenerate cells and produce its own painkillers, there is so much to learn about this incredible organ. We’ll also delve into the different parts of the brain and the important roles they play in our overall health and well-being.

So get ready to be amazed and have your mind blown by these 10 fascinating facts about the human brain.

What to expect:

  • An overview of the complexity and size of the human brain
  • The importance of neuroplasticity and the brain’s ability to adapt and change
  • A breakdown of the different parts of the brain and their functions
  • The role of the blood-brain barrier and the brain’s ability to regenerate cells
  • The ability of the brain to produce its own painkillers and process information faster than a computer
  • The ongoing mystery and research surrounding the brain and its capabilities

Fact #1: The Human Brain is the Most Complex Organ in the Body

It’s no secret that the human brain is a complex organ, but just how complex is it? With over 100 billion nerve cells (neurons) and trillions of supportive cells called glial cells, the human brain is the most complex organ in the body. It controls all of the body’s functions, including movement, sensation, thought, and emotion.

But what exactly do all of these neurons and glial cells do? Neurons are responsible for transmitting information throughout the body and the brain. They communicate with each other through electrical and chemical signals, allowing us to think, feel, and experience the world around us. Glial cells, on the other hand, provide support and protection for neurons, helping to keep them healthy and functioning properly.

Fact #2: The Human Brain is the Largest Brain in Proportion to Body Size of All Mammals

Despite its small size (the human brain only makes up about 2% of a person’s total body weight), the human brain is the largest brain in proportion to body size of all mammals. In fact, a newborn baby’s brain is already almost as large as an adult brain, but it continues to grow and develop throughout childhood and adolescence.

This rapid brain growth is especially important during the first few years of life, as the brain is exposed to a wealth of new experiences and information. This is why it’s so important for young children to have plenty of opportunities to explore, learn, and play.

Fact #3: The Brain is the Most Energy-Hungry Organ in the Body

Despite its small size, the brain is a major energy hog. It uses about 20% of the body’s total energy, even though it only makes up about 2% of the body’s weight. This is because the brain is constantly active, even during sleep.

In fact, the brain is the only organ in the body that continues to use glucose (a type of sugar) as its primary source of energy even during sleep. This constant energy demand is why it’s so important to get enough sleep and to eat a healthy, balanced diet.

Fact #4: The Brain is Capable of Forming New Neural Connections Throughout Life

One of the most fascinating things about the human brain is its ability to adapt and change in response to new experiences. This process, known as neuroplasticity, allows the brain to form new neural connections throughout life.

This means that the brain is capable of learning and adapting throughout a person’s lifetime. So no matter how old you are, it’s never too late to learn something new and challenge your brain.

Some ways you can encourage neuroplasticity and keep your brain healthy and active include:

  • Learning new skills or hobbies
  • Doing puzzles and brainteasers
  • Meditating or practicing mindfulness
  • Exercising regularly
  • Getting enough sleep

Fact #5: The Brain is Made Up of Three Main Parts: the Cerebrum, the Cerebellum, and the Brainstem

The human brain is made up of three main parts: the cerebrum, the cerebellum, and the brainstem.

The cerebrum is the largest part of the brain and is divided into two hemispheres (left and right). It is responsible for a wide range of functions, including:

  • Thinking and decision making
  • Movement and coordination
  • Sensation and perception
  • Memory and learning

The cerebellum is located under the cerebrum and is responsible for coordinating movement and balance. It also plays a role in some cognitive functions, such as language and

Fact #6: The Brain Contains a Network of Blood Vessels Called the Blood-Brain Barrier

The brain is protected by a network of blood vessels called the blood-brain barrier. This barrier is made up of special cells that line the blood vessels in the brain and help to protect the brain from harmful substances in the bloodstream.

While this protection is important for maintaining the health and function of the brain, it can also make it difficult for certain medications to reach the brain and be effective. This is why some medications must be taken in specific ways (such as intravenously) in order to bypass the blood-brain barrier and reach their target in the brain.

Fact #7: The Brain is Capable of Regenerating Some of Its Cells

While the brain is not able to regenerate lost neurons, it is able to generate new glial cells, which support and protect neurons. Studies have also shown that certain areas of the brain, such as the hippocampus (a region involved in memory and learning), are capable of generating new neurons throughout a person’s lifetime.

This ability to regenerate cells, along with the brain’s ability to adapt and change through neuroplasticity, helps to maintain the health and function of the brain throughout a person’s lifetime.

Fact #8: The Brain is Capable of Creating Its Own Painkillers

When a person experiences pain, the brain releases chemicals called endorphins, which act as natural painkillers. Endorphins can also produce a feeling of euphoria, which is why they are sometimes referred to as “natural opioids.”

Endorphins are released in response to pain, exercise, and other forms of stress, and they can help to reduce the sensation of pain and improve mood. Some people even experience a “runner’s high” after exercising, which is thought to be caused by the release of endorphins.

Fact #9: The Brain is Able to Process Information Faster than a Computer

The human brain is capable of processing information at an incredible speed, making it capable of performing complex tasks and making quick decisions. However, computers are still able to process and store much more information than the human brain.

One reason for this is that computers are able to operate at much faster speeds than the human brain. While the brain can process information at a rate of about 120 meters per second, computers can operate at speeds of up to billions of calculations per second.

Fact #10: The Brain is Still Not Fully Understood

Despite the many advances in neuroscience, there is still much that we don’t know about the brain and how it works. The brain is an incredibly complex organ, and researchers continue to study it in order to better understand its functions and capabilities.

Some of the mysteries that scientists are still working to unravel include:

  • How the brain processes and stores information
  • How the brain generates consciousness
  • The role of glial cells in brain function
  • The causes of and potential treatments for brain disorders and diseases

The human brain is an incredible and complex organ that is capable of amazing feats. From its size and complexity to its ability to regenerate cells and produce its own painkillers, there is so much to learn about this vital organ.

We hope that these 10 fascinating facts about the human brain have sparked your curiosity and given you a deeper appreciation for the amazing capabilities of the human brain.

We’ve only scratched the surface of all there is to know about the brain, and there is still so much that researchers are working to understand. From the latest breakthroughs in neuroscience to tips for keeping your brain healthy and active, there is always more to learn.

If you’d like to continue exploring the mysteries of the human brain and stay up-to-date on the latest research and insights, be sure to follow my Medium page. We’ll be sharing more articles on the brain and other fascinating topics, so stay tuned!

Thanks again for reading, and we hope you have a better understanding and appreciation for the incredible capabilities of the human brain.

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Jake the Curious
Jake the Curious

Written by Jake the Curious

I’m a science and space writer with a passion for making complex topics accessible to everyone. I believe that everyone has a right to understand the universe.

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