Transcript Nervous System 6th Grade Health

Nervous System
th
6 Grade
Health
Mr. Springer
Nervous System Fast Facts
The brain weighs about 3 pounds
Gross Picture Alert!
Nervous System Fast Facts
The brain contains about 10 billion cells that regulate:
Your conscious acts
Ex. Walking, talking, playing the piano
Your involuntary functions
Ex. Coughing, blinking, swallowing, breathing
And your emotions
Ex. Love, anger
Nervous System Fast Facts
The nervous system requires oxygen to do it’s
work.
Ex. 15 seconds without oxygen will cause us to lose
consciousness
Ex. 4 minutes without oxygen will cause irreparable
damage to the brain and even death
Nervous System Fast Facts
The smallest neuron in the body is .004mm.
The longest neuron in the body runs from the spinal
cord to the big toe, and is over 1 meter long!
The Job Of The Nervous System
Sends and interprets “messages”
Allows the entire body, inside and out, to
work together
Neurons
(Nerve Cell)specialized cells that
carry information from
the brain to the body
and from the body to
the brain

Synapse:
The location where one neuron meets with
another cell (neuron, muscle, vein, etc.) and
an electrical current is exchanged.
Real life
Microscope images of nerves!
Vocabulary

Central Nervous System- includes the
brain and spinal cord, it’s the body’s main
control center
Vocabulary

Peripheral Nervous
System- includes the
nerves that connect the
CNS to all parts of the
body
Sensory Nerves & Motor Nerves

You have two types of nerves:

Sensory- carries messages from the sense
receptors to the brain and spinal cord

Motor- carries messages from the brain to
the muscles, glands, and other body
structures, resulting in actions
Parts Of The Brain

Cerebrum- it’s the largest part of the brain, it
controls your ability to think, memorize, and
learn. It also receives messages for your
senses (sight, hearing, smell, touch, and taste)

Cerebellum- it controls balance, posture, and
coordination.

Medulla- it controls your involuntary muscle
actions such as breathing.
Cerebrum
Cerebellum
Medulla
Problems With The Nervous System

MS (Multiple Sclerosis)- degenerative
disease in which the protective outer coating
of nerves is damaged, thus the nerves no
longer work properly

Problems with thinking and memory
Problems With The Nervous System

Parkinson’s – Shaking and stiffness of the
arms and legs.

Epilepsy – Seizures, as a result of abnormal
electrical activity in brain.

Alzheimer’s – affects mostly older people, it
is inflamed areas in the brain and death of
neurons (atrophy). Leads to memory loss and
dementia
Neck/Spine Injuries

Can lead to paralysis
(loss of feeling and mobility in parts of the body)

FACT: The medulla is part of your spinal
cord. If you break your neck, you may
damage this part of your brain. If this part of
your brain is damaged the result can be
death because your organs shut down!
Brain Diagram Without
Labels
Brain Diagram
(W/Labels)

http://www.edhelper.
com/teachers/health
_Brain_with_Labels.
htm
Nervous System
Diagram(W/O Labels)

http://www.edhelper.co
m/teachers/health_Nerv
ous_System.htm
Nervous System
Diagram (W/Labels)

http://www.edhelper.com/t
eachers/health_Nervous_
System_with_Labels.htm
Review

At this website, we will connect nerves from
different body parts to the section of the
spinal cord they connect to.

Notice the parts of the brain that light up.
(That section of the brain controls the body part)
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