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Video:The Three Main Parts of the Brain

with Milo De Prieto

Did you know that the brain weighs up to 3 pounds and is the fattest organ in the body? Learn the parts of the brain, their primary functions, and other interesting facts in this biology video from About.com.See Transcript

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Transcript:The Three Main Parts of the Brain

Hello I'm Milo for About dot com and today we're talking about the 3 main parts of the brain. 

Facts About the Brain

The adult brain weighs about three pounds and it has reached its full and maximum size by the time we are six years old. An interesting fact about the human brain is that it is made up mostly of water and fat. Our brain mediates everything we do as it is the center of the nervous system. It is a complex organ and it floats in the cranium in a liquid called cerebrospinal fluid.

The Three Parts of the Brain

The brain is made up of three main parts: the cerebrum, the brain stem, and the cerebellum. The cerebrum, also referred to as the forebrain, is the most complex of the three main parts. Responsible for our learning, remembering and feeling it also performs activities such as chewing, hearing, smelling, tasting, seeing and many other crucial human functions. 

The brainstem, as its name indicates, looks like the stem of a branch. The brainstem is made up of the midbrain and the hindbrain. The midbrain is located on the upper part of the brainstem and it responsible for sending and receiving information. The spinal cord is connected to the brain via the brainstem. The hindbrain is connected to the lower part of the brainstem and it is broken up into three sections:

  • The medulla oblongata – is the control center for breathing, blood pressure, and other involuntary but vital body functions. Damage to the medulla oblongata can be fatal.
  • The pons – is involved in sensory analysis and motor control. It is also linked to functions associated to sleep and consciousness.
  • The Cerebellum – involved in functions such as motor movement and coordination.  

More About the Brain

Some fun and curious facts about the human brain:

  • The brain is 75% water
  • It is 60% white matter and 40% gray matter
  • The brain is the fattest organ in the body
  • No oxygen to the brain for 5 to 10 minutes is sure to cause permanent brain damage.
  • Brain waves are more active during sleep hours than awake hours, according to studies
  • You can snore or dream but can not do both at the same time.

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