The Human Brain

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These plates form the cranium. The cranium provides
maximum protection with minimum weight, the ideal combination. The other
twenty bones make up the face, jaw and other parts of the skull.

Another way the brain keeps it self safe is by keeping itself in
liquid. Nearly one fifth of the blood pumped by the heart is sent to the
brain. The brain then sends the blood through an intricate network of
blood vessels to where the blood is needed. Specialized blood vessels
called choroid plexuses produce a protective cerebrospinal fluid. This
fluid is what the brain literally floats in.

A third protective measure taken by the brain is called the blood
brain barrier. This barrier consists of a network of unique capillaries.
These capillaries are filters for harmful chemicals carried by the blood,
but do allow oxygen, water and glucose to enter the brain.


THE DIFFERENT SECTIONS OF THE BRAIN


The brain is divided into three main sections. The area at the
front of the brain ...

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of the spinal cord. The medulla controls the way your
heart pumps blood through your body. It also looks after your breathing
and helps you digest food.

THE DIFFERENT PARTS OF THE BRAIN

THE BRAINSTEM:

The brainstem is one of the oldest parts of the brain. It
controls such functions as breathing, blood pressure, swallowing and heart
rate.

THE HYPOTHALMUS:

This part of the brain is located directly above the brain stem.
The hypothalmus controls basic drives like hunger and sex and as well as
our response to threat and danger. The hypothalmus also controls the
pituitary.

THE PITUITARY:

The pituitary produces hormones such as testosterone that
circulate through out the ...

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