The Nervous SystemThe Nervous SystemPrinciples of Health

Science

What is the nervous system What is the nervous system composed of?composed of?

• Brain• Spinal Cord• Nerves• Sense Organs• Receptors

Fun Fun factsfacts first! first!

What’s it made of?What’s it made of?

• 77% Water• 10-12% Lipids• 8% Protein• 1% Carbs• 2% Soluble Organics• 1% Inorganic Salt

There are…There are…

• 100 Billion Neurons in the Human Brain

About The same amount…About The same amount…

• Of Stars in the Sky

The left hemisphere has…The left hemisphere has…

• 186 million more neurons than the right hemisphere.

750-1000ml of blood flow…750-1000ml of blood flow…

• through the brain every minute.• This is about 3 full soda cans!

The brain can stay alive…The brain can stay alive…

• 4-6 minutes without oxygen!

The slowest neurons in the brain…The slowest neurons in the brain…

• travel at 260 MPH. • As “slow” as today’s fastest car!

(Clocked at 253 MPH)

More electrical impulses…More electrical impulses…

• Are generated in one day by a single human brain than all the telephones in the world.

The human brain has…The human brain has…

• 70,000 thoughts in an average day.

FUNCTIONS OF FUNCTIONS OF THE BRAINTHE BRAIN

(or noodle)

• Creativity

• Imagination

• Artists• Dreamer

s• Visual

Spatial

• Logical• Mathematic

al

• Linguistic• Speech

LeftLeft vs.vs. rightright

How does the How does the

brain

communicate communicate with the rest of with the rest of

the body?the body?

neuronsneurons

Sensory NeuronsSensory Neurons

• Specialized to detect senses• Example: pressure or heat

Motor neuronsMotor neurons

• Impulses that signal muscle contractions… motion.

interneuronsinterneurons

• Connect with other neurons.

CFUCFUPlease put your notes away and your

thinking cap on.

Rules:Rules:• Use your motor neurons (raise your hand) if you

think you know the answer!• If you get it right then I will feed your sensory

organs.

Part of the nervous system that starts with a “B”Part of the nervous system that starts with a “B”

#1

Name that neuron:Name that neuron:

(The connection of neurons)

#2

Two Parts of the nervous system that start with Two Parts of the nervous system that start with an “s”an “s”

#3

Name that Neuron:Name that Neuron:

(Senses heat)#4

Part of the nervous system that starts with an Part of the nervous system that starts with an “N”“N”

#5

Part of the nervous system that starts with an Part of the nervous system that starts with an “R”“R”

#6

Name that Neuron:Name that Neuron:

#7

Name that Neuron:Name that Neuron:

#8