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2. Definition
Key words

3. HOWTHE SYSTEM WORKS
The basic functioning of
the nervous system
depends on tiny cells
called neurons.The brain
has billions of them all with
different specialized jobs.
WHY IS IT IMPORTANT
The nervous system helps all
the parts of the body to
communicate with each other
and to brain.Without this
system our body will not work.
WHEREIS IT
The brain and spinal
cord form the control center
known as the central nervous
system. But the nervous
system is in our whole body.

4. A nervous system is consists of these three organs-
• BRAIN
• SPINAL CORD
• NERVES
BRAIN-The brain, a soft, wrinkled organ that weighs about 3 pounds, is located inside the cranial cavity, where the bones of the
skull surround and protect it.The approximately 100 billion neurons of the brain form the main control center of the body.The
brain and spinal cord together form the central nervous system (CNS).
SPINAL CORD-The spinal cord is a long, thin mass of bundled neurons that carries information through the vertebral cavity of the
spine beginning at the medulla oblongata of the brain on its superior end and continuing inferiorly to the lumbar region of the
spine.
NERVES- Nerves are bundles of axons in the peripheral nervous system (PNS) that act as information highways to carry signals
between the brain and spinal cord and the rest of the body.

6. TEEN INJURIES DRUGS EFFECT

7. WAYS TO IMPROVE NERVOUS SYSTEM
THINGS THAT COULD WRONG IF YOU DO NOT DO
THE THINGS TO IMPROVE YOUR BODY SYSTEM
CAN WE LIVE WITHOUT IT

8. SYSTEM FUNCTION
ASSOCIATED
ORGANS
INTRACTION
The skeletal system
makes up the
framework of the body
and allows us to move
when our muscles
contract. It stores
minerals (e.g. calcium,
phosphorous) and
releases them into the
body when they are
needed. The skeletal
system also protects
internal organs and
produces blood cells.
BONES (ex: skull) Bones provide calcium that
is essential for the proper
functioning of the nervous
system.
The skull protects the
brain from injury.
The vertebrae protect the
spinal cord from injury.
Sensory receptors in joints
between bones send
signals about body position
to the brain.
The brain regulates the
position of bones by
controlling muscles.