1. PP3 - Nothing to become nervous about!
The Nervous System

2. How do we control our body?
All of the systems in your body are controlled by the nervous and endocrine systems.
We use these systems to:
Move
Digest food
Breathe
Think
Talk
+ much more

3. The Nervous System Can be split into two groups:
Central Nervous System (CNS)
Brain
Spinal cord
Peripheral Nervous System (PNS)
- Nerves (made of bundles of neurons)
Get students to copy down this slide
Copy down this information in your books 

4. Central Nervous System- Brain
The brain is the main organ of the nervous system. It controls the actions of the nervous AND endocrine system.
There are three main parts:
Cerebrum
Cerebellum
Brain stem

5. A representation of the brain
Which side of the brain do you think this picture shows us?
The front
The left side
The back
The right side
Draw a quick sketch of the brain AND label:
The cerebrum
The cerebellum
The brain stem

6. The Cerebrum Is the largest part of the brain Responsible for: Memory
Speech
Voluntary action
Conscious thought.. (What is conscious thought?)

7. The Cerebellum Is the small part of the brain at the back of your head
Responsible for:
Balance
Coordination
Involuntary muscular activity
What might happen if you had a damaged cerebellum and you rode a bike?

8. The Brain Stem Located at the base of the brain Responsible for:
Involuntary actions
e.g Breathing, heart beat and digestion
The Respiratory System
The Circulatory System
The Digestive System

9. The Spinal Cord Pathway to the brain from sensory neurons
Pathway away from the
brain to motor neurons

10. Peripheral Nervous System
Includes all other nervous system structures outside of the CNS
e.g Nerves (made up of neurons)
Connects all areas of the body to the CNS

11. Neurons Neurons are the longest cells in our bodies.
Communicate with eachother and pass messages along to other neurons.
Electrical nerve impulses travel along them in only ONE DIRECTION.
To assist you in remembering

12. Types of Neurons Sensory neurons
Send nerve impulses to the brain from receptors (sense organs)
Motor neurons
- Send nerve impulses from the brain to the muscles or glands

13. Sensory Neuron (Afferent)

14. Motor Neuron (Efferent)

15. Class task Draw a labelled picture of: A sensory neuron A motor neuron
Make sure to include:
1) An arrow showing the
direction of nerve impulse.
2) Labels for the axon, cell body and myelin sheath
Ask a student/students to come draw on the whiteboard.

16. HOW DOES IT ALL WORK?
RESPONSE
Contraction of the skeletal muscles, more commonly known as shivering, is the body’s response to low body temperature.

17. Reflex Arc
Sometimes referred to as the reflex loop or a reflex action.
Very fast response to a stimulus
Can be thought of as a ‘short cut’
Why do you think we have the reflex arc? What purpose does it serve?

18. Representation of the reflex arc

19. Interesting Facts
The left side of your brain controls the right side of your body and the right side of your brain controls the left side of your body.
There are more nerve cells in the human brain than there are stars in the Milky Way.
Sea sponges have no nervous system

20. Crash Course Biology https://www.youtube.com/watch?v=x4PPZCLnVkA
If you liked this video and are interested in seeing more, type in “Crash course” into YouTube. 
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