Mind / μυαλό
The mind is usually associate with the human brain. It is generally accepted that the human mind resides in the brain. The mind is to the brain what the software is on the computer. The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain weighs about 3 lbs. (1.4 kilograms) and makes up about 2% of a human's body weight. Brain information travels up to an impressive 268 miles per hour. When a neuron is stimulated, it generates an electrical impulse that travels from cell to cell. Among humans, brain size doesn't indicate a person's level of intelligence. Here are some facts about the brain:
The Human brain contains about 100 billion neurons and about 10- to 50-fold more glial cells whose function is not completely understood as of today.
The neurons interconnect through multiple connections with each other creating the most complex lattice of interconnection, found in the known universe.
The human brain triples in size during the first year of life and reaches full maturity at about age 25.
Humans use all of the brainpower all of the time, not just 10% of it.
The brain contains about 60% fat.
The human brain can generate 23 watts of electrical power — enough to fuel a small lightbulb.