Transcript Nervous system - Nayland College

Nervous System
By Mark de Jong,
Alana Cribb-Williams,
Sam Thompson &
Charlotte Bonny
Contents
What is the nervous system??
 Example of the Nervous system at work??
 How does the nervous system work?
 So how does it pass along messages??
 So your nervous system is made up of…
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
Multiple Sclerosis
What is the Nervous System??

The Nervous System is made up of your
brain, spinal cord and nerves and is the
control centre for your entire body. With
out it you could not possibly exist as it
control everything you do. Such as
moving, hearing, smelling, breathing and
even things like thinking, dreaming and
remembering.
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Example of the nervous system at
work.

If you put your hand on a hot stove the
nerves in your skin send a message of
pain to your brain. The brain then sends a
message back telling the muscles in your
hand to pull away.
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How does the Nervous System
work?

The nervous system controls everything
you do by sending messages back and
forth from your brain to coordinate all of
your actions and reactions.
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Nerves are thin threads of nerve cells
called neurons that run through out your
body. They are all bundled together and
send the messages to and from your brain
to all the muscles in your body.
 There are two different types of nerves,
Sensory nerves and Motor nerves.
 Sensory nerves send messages to the
brain where as Motor nerves transport
messages from your brain.
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So how does it pass along messages??
Neurons are shaped almost like stars and
to varying degrees each point is stretched
so that they have long fingers. Neurons
are very thin some are very small and
some can be 3 feet long.
 Nerves as mentioned before are long
threads of neurons where the fingers of
each neuron almost reach the fingers of a
another.
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When a neuron is stimulated (by heat, a cold
touch, sound vibrations or some other message)
it generates a tiny electrical pulse.
The electricity & chemical change travels the
length of the neuron. When its gets to the fingerlike point it needs help to get to the next neuron,
so that’s where the chemicals come in. The
electrical pulse in the cells triggers a release of
chemicals that carry the pulse to the next cell
and so goes until the message completes the
length of the nerve and delivers the message.
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So the main components of are
Nervous System are…
The Brain
 The Spinal cord
 Neurons
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The Brain
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The Brain is the command centre of your
entire body and is made up of billions of
neurons. Its role in the nervous system is
to send messages down the motor nerves
to all the muscles and glands in the body.
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The Spinal Cord

The Spinal Cord is a tube neurons that
runs up your spine ands attaches to your
brain stem. All nerves spread out from the
spinal cord and some message are even
processed in the spinal cord but most
message are sent to the brain. It is the
main highway of nerves.
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Neurons
Neurons are the cells that make up
nerves. They carry the messages.
 There are two types of nerves:
Sensory nerves which send the messages
to the brain from all the muscles and
glands in your body.
Motor nerves which send messages from
your brain to all the muscle and glands in
your body.
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Multiple Sclerosis - The Basics
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Multiple Sclerosis is an autoimmune disease,
this means that the immune system attacks a
vital component of your body.
Multiple Sclerosis can be caused by a genetic
predisposition that means when exposed to a
virus or toxin your immune system attacks the
myelin. The myelin protects and speeds up
messages that are sent around the body. When
attacked it slows down nerve impulses and
eventually stops messages altogether causing
death. This means it is a progressive disease.
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Multiple Sclerosis – In Depth

Multiple Sclerosis is a Multiple Sclerosis is basically
inflammation of the brain and spinal cord. It is a disease
of the tissue matter. This tissue is made up of nerve
fibers which are responsible for sending communication
signals within and between the Central Nervous System
(CNS), and the nerves supplying the rest of the body.
Neurons and white tissue are most likely to be attacked
in MS. During periods of MS activity white blood cells
(leukocytes) are drawn to regions of the white matter.
These initiate and take part in what is known as the
inflammatory response. The resulting inflammation is
similar to what happens in your skin when you get a
pimple.
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Credits
Allama, Muffin, Sambo
& Mark DEgong
 By
 With
special thanks to
Ned