Learn about the human brain structure, functions of its parts and general functions of the brain.

THE HUMAN BRAIN
The brain is one of the largest and most complex organs in the human body. The brain is however very delicate. Any damage to it is serious to the body in general. The brain is surrounded by a layer of tissue called the meninges. Meninges protect the brain from shock. The skull (cranium) helps protect the brain from physical (mechanical) injuries.

The brain is made up of more than 100 billion neurons (nerve cells) that coordinate body activities. Since body organs do not work in isolation, there activities have to be coordinated. This coordination is real communication.

Humans need to be aware of what is happening around them and within their bodies.  This communication is done by the nervous system and the hormonal system.

The brain deals with electro-chemical messages called nerve impulses. The nerve impulses are generated when different stimuli are perceived by body sense organs.

The sense organs we have include;-
Eyes –for light perception (seeing).
Ears –for sound perception (hearing) and body balance.
Skin – for temperature and touch.
Nose – for smell.
Tongue- for tasting.

THE HUMAN BRAIN

The brain is located in the head. Because it is very delicate, it is protected by the cranium (skull), a very strong bone. It is connected to all body parts by a system of nerves.

 The nerves are of three types: - the sensory, relay and motor nerves.
Sensory nerves- carry messages to the brain.
Relay nerves- are involved in interpretation of information
Motor nerves- effects the necessary changes (responses).

“A brain that is not exercised (dull brain) rusts!’’
The brain is a very important organ in our lives.
 It directs ones, way.
There is a common saying which says “as he thinks, so he is.”

If the brain is fed with correct information, it will produce right things.
The brain is very important in decision making.
The brain stores information and the information can be retrieved when it is needed.
Like a hard disc is present in a computer, the brain is present in the human body.