Question

I want to know how brain works in human body ?

Answer 1

THE BRAIN IS COMPOSED OF MANY PARTS EACH HAVING SPECIFIC FUNCTION. THE BRAIN SENDS THE BODY INFORMATION THE FORM OF NERVOUS IMPULSE. THE ELECTRICITY MADE BY THE BRAIN IN ONE DAY IS AMPLE TO RUN A LIGHT OF 30 WATT FOR 4 HRS. 

Answer 2

The nerve cells transmit or conduct nerve impulses from the sense organs to the brain and from brain to body's motor organ. They percieve stimuli.
This is how the brain works.