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Your brain is your most powerful organ, it weighs only about three pounds. It has a structure similar to a firm jelly.

It consists of three main parts:

1. The brain fills a large part of the skull. It is involved in remembering, problem solving, thinking, and feeling. It also controls movement.

2. The cerebellum is located in the back of the head, under the cerebrum. It controls coordination and balance.

3. Brain stem sits in your cerebrum in front of the cerebellum. It connects to the brain, spinal cord and automatic control functions such as breathing, digestion and heart rate and blood pressure.

Your brain is powered by one of the richest networks of blood vessels in the body.

With each moment, arteries carry about 20 to 25 percent of your blood to the brain, where billions of cells using about 20 percent oxygen and fuel your blood carries.

When you think hard, your brain may use up to 50% of fuel and oxygen.

The entire judicial system includes veins and capillaries in addition to arteries.

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