the human brain
DESCRIPTION
TRANSCRIPT
The Nervous SystemEssential question: What is the nervous
system and how does it work?
What is the nervous system composed of?
• Brain • Spinal Cord • Nerves • Sense Organs • Receptors
Fun facts first!
What’s it made of?
• 77% Water • 10-12% Lipids • 8% Protein • 1% Carbs • 2% Soluble Organics • 1% Inorganic Salt
There are…
• 100 Billion Neurons in the Human Brain
About The same amount…
• Of Stars in the Sky
The left hemisphere has…
• 186 million more neurons than the right hemisphere.
750-1000ml of blood flow…
• through the brain every minute. • This is about 3 full soda cans!
The brain can stay alive…
• 4-6 minutes without oxygen!
The slowest neurons in the brain…
• travel at 260 MPH. • As “slow” as today’s fastest car!
(Clocked at 253 MPH)
More electrical impulses…
• Are generated in one day by a single human brain than all the telephones in the world.
The human brain has…
• 70,000 thoughts in an average day.
FUNCTIONS OF THE BRAIN
(or noodle)
• Creativity • Imagination • Artists • Dreamers • Visual
Spatial
• Logical • Mathematical • Linguistic • Speech
Left vs. right
How does the
brain communicate with
the rest of the body?
neurons
Sensory Neurons
• Specialized to detect senses • Example: pressure or heat
Motor neurons
• Impulses that signal muscle contractions… motion.
interneurons
• Connect with other neurons.
Quiz Time!
Rules:• Use your neurons to answer the following
questions in your notes. • When you are done, I will feed your sensory
organs.
Part of the nervous system that starts with a “B”
#1
Name that neuron:
(The connection of neurons)
#2
Two Parts of the nervous system that start with an “s”
#3
Name that Neuron:
(Senses heat)#4
Part of the nervous system that starts with an “N”
#5
Part of the nervous system that starts with an “R”
#6
Name that Neuron:
#7
Name that Neuron:
#8