All of the parts are controlled by an organ called the brain, which is

located in the head. The brain weighs about 2.75 pounds, and has a

whitish-pink appearance. The brain is made up of many cells, and is the

control centre of the body. The brain flashes messages out to all the

other parts of the body. The messages travel in very fine threads called

nerves. The nerves and the brain make up a system somewhat like telephone

poles carrying wires across the city. This is called the nervous system.

The nerves in the body don't just send messages from the brain to

the organs, but also send messages from the eyes, ears, skin and other

organs back to your brain. Some nerves are linked directly to the brain.

Others have to reach the brain through a sort of power line down the back,

called the spinal cord. The brain and spinal cord make up the central

The brain doesn't just control your organs, but also can think and

remember. That part of the brain is called the mind.

PROTECTING THE BRAIN

Twenty-eight bones make up the skull. Eight of these bones are

fluid is what the brain literally floats in.

glucose: This is a combination of sugar and water.

controls basic drives such as hunger and sex.

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