The Human Brain
The human brain is an organ inside our head that let’s us think, feel, see, move, hear, taste and smell things. It controls our body, gets information from the outside world, figures it out stuff faster than the fastest com-puter, and keeps it all in memory files in our brain. Billions of nerve cells get messages from the world, decide what to do, and then tell the body how to act. Our brain is like a movie director telling the actors what to do, only the actors in our body's play are parts of the brain (called lobes) and the nerves.
If you took a brain out of someone’s head (yuck!) and weighed it on a scale, it would weigh about 3 pounds (a laptop weighs more than a brain). Of course, the weight of a brain depends on the age of the person. For example, when we are born, our brain weighs less than 1 pound. When we’re growing up, the number of cells in our brains stays about the same but they get bigger and make more connections with other cells (this is called learning).
The LOBES in each half of our brain control different things. They are part of your brain team.
PARIETAL LOBE : speech, sensory signals.
OCCIPITAL LOBE : vision.
FRONTAL LOBE : personality, reasoning, speech, muscles.
TEMPORAL LOBE : hearing, speech, under-standing stuff.
Facts About The Brain
* Your nerves can send signals at more than 200 miles per hour!
* Your brain is 80% water!
* Your brain stops growing when you are 15, but learning never stops!
* Your brain uses as much power as a 10-watt light bulb!
* Your brain has between 10 billion to 100 billion nerve cells.
* Each nerve cell in your brain can have up to 250,000 connections to other nerve cells!
* Scientists have learned more about the brain in the last 10 years than they did in the last 100 years thanks to technology!
* Scientists say that if you do something twice it can double your
ability to remember it!
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