Brain and parts

 The human brain is the command center for the human nervous system.

 it is composed of billions of neurons that communicate together by forming numerous

connections and synapses.

 In terms of weight, the average adult human brain weighs in at 1300 to 1400 grams,

just 2% of the body’s total weight.

 A human brain isn’t very much bigger – about the size of your two fists put together.

 But it’s the most complex thing in the known universe.

 It receives signals from the body’s sensory organs and outputs information to the

muscles, embodies the essence of the mind and soul.

 The brain receives information through our five senses: sight, smell, touch, taste, and

hearing – often many at one time.

 It assembles the messages in a way that has meaning for us, and can store that

information in our memory.

 The brain controls our thoughts, memory and speech, movement of the arms and legs,

and the function of many organs within our body.


 The central nervous system (CNS) is composed of the brain and spinal cord.

 The peripheral nervous system (PNS) is composed of spinal nerves that branch from

the spinal cord and cranial nerves that branch from the brain.