Nervous
10-12

     The spinal cord is a long bundle of white nerve matter that resides in the middle of the spinal column.  This serves as the link between the brain and the body.  It also serves as the center from which reflexes stem from.

     The brain is much more complex than the spinal cord.  It has many divisions within it.  These are the brain stem, the cerebellum, the cerebrum.

     The brain stem is the core for most of the life systems commands such as breathing and heartbeat.  It is the most primitive of the brain divisions and the process that are contained within it cannot be consciously controlled.

     The cerebellum is the next most advanced of the brain divisions. It controls balance and the coordination of muscles to obtain movement.
The Brain

     The cerebral cortex is by far the most advanced part of the brain.  This is where conscious though takes place.  The cerebellum itself can be divided into the left and right hemispheres.  It can also be divided into the parts that control specific functions such as hearing and sight.  The right hemisphere, generally, is the artistic side of the brain.  People who are right brained (their right hemisphere is dominate over the left) are into art, music, and abstract thinking.  Left brained people are very logical.  They excel in math and physics and other logical thought processes.  The two hemispheres are connected by the corpus callosum which is the means for the two hemisphere to communicate with each other.  However, it has been proved by scientific experiment that both hemispheres with function normally if the corpus callosum is severed.
Systems
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