1. The Nervous System
Essential question: What is the nervous
system and how does it work?

2. What is the nervous system composed
of?
• Brain
• Spinal Cord
• Nerves
• Sense Organs
• Receptors

3. Fun facts first!

4. What’s it made of?
• 77% Water
• 10-12% Lipids
• 8% Protein
• 1% Carbs
• 2% Soluble Organics
• 1% Inorganic Salt

6. There are…
•
100 Billion Neurons in the Human
Brain

7. About The same amount…
•
Of Stars in the Sky

8. The left hemisphere has…
• 186 million more
neurons than the
right hemisphere.

9. 750-1000ml of blood flow…
• through the brain every minute.
• This is about 3 full soda cans!

10. The brain can stay alive…
• 4-6 minutes
without
oxygen!

11. The slowest neurons in the brain…
• travel at 260 MPH.
• As “slow” as today’s fastest car!
(Clocked at 253 MPH)

12. More electrical impulses…
• Are generated in
one day by a
single human
brain than all
the telephones
in the world.

13. The human brain has…
• 70,000
thoughts in an
average day.

16. FUNCTIONS OF
THE BRAIN
(or noodle)

17. Left
vs.
right
• Logical
• Creativity
• Mathematical
• Imagination
• Linguistic
• Speech
• Artists
• Dreamers
• Visual
Spatial

19. How does the
brain
communicate with
the rest of the
body?

20. neurons

21. Sensory Neurons
• Specialized to detect senses
• Example: pressure or heat

22. Motor neurons
• Impulses that
signal muscle
contractions…
motion.

23. interneurons
• Connect with
other neurons.

24. Quiz Time!

25. Rules:
• Use your neurons to answer the following
questions in your notes.
• When you are done, I will feed your sensory
organs.

26. Part of the nervous system that starts with a “B”
#1

27. Name that neuron:
(The connection of neurons)
#2

28. Two Parts of the nervous system that start with an
“s”
#3

29. Name that Neuron:
(Senses heat)
#4

30. Part of the nervous system that starts with an “N”
#5

31. Part of the nervous system that starts with an “R”
#6

32. Name that Neuron:
#7

33. Name that Neuron:
#8