Human Nervous System

Human Nervous System

In the previous section we saw that the spinal cord plays an important role in reflex action. 

The spinal cord is composed of many nerves. All these nerves are concentrated in the brain. The brain is the main coordinating center of the body.

The nervous system is composed of:

• The brain and spinal cord together receive and integrate the information from all parts of the body.
• It is your brain that comprehends all the information based on stimuli and sends messages to your muscles to perform voluntary actions based on what needs to be done next. 
  For example, think about the steps involved in writing your name on your book;
• You take your book
• Open the book
• Lift your pencil
• Decide where to write
• Write your name
• If you make a mistake, then you decide to erase it
• You keep everything back when you finish the task

So, the Central Nervous System (Brain and Spinal cord) together with the Peripheral Nervous System (Nerves) helps us to take actions based on what we think and what is to be done.