1. The Nervous System By: Katherine Pease http://powerbacks.com/web_pages/science.html

2. What is your Nervous System? What does it do for you? Brainstorm answers as a class Brainstorm answers as a class

3. Listen and Watch to see if correct.

4. So… What is your Nervous System? The Nervous System is a busy and complex network of nerves. The Nervous System is a busy and complex network of nerves.

5. Here is another way to look at it…

6. Central Nervous System is… consists of the brain and spinal chord consists of the brain and spinal chord

7. Peripheral Nervous System is… Consists of the nerves that run through out the body. Consists of the nerves that run through out the body. These nerves carry messages between the central nervous system and the body. These nerves carry messages between the central nervous system and the body. http://www.bbc.co.uk/science/humanbody/body/factfiles/nervous_anatomy.shtml

8. The Nervous system has 3 main parts…. Brain Brain Neurons Neurons Spinal Chord Spinal Chord http://www.contmediausa.com/shop/app/products/Human3D/human3dnervoussystem.html

9. What is the main function of the brain? It is the control center for the entire body. It is the control center for the entire body.

10. The brain contains… Cerebrum Cerebrum Cerebellum Cerebellum Medulla Medulla Spinal Chord Spinal Chord http://www.brainhealthandpuzzles.com/diagram_of_brain.html

11. Function of the Cerebrum… To control thinking, learning, memory, awareness, and some voluntary movements. To control thinking, learning, memory, awareness, and some voluntary movements. It controls all the senses It controls all the senses Larges part of the brain Larges part of the brain

12. Function of the Cerebellum… It controls muscle activity and balance. It controls muscle activity and balance. Located at the back of the head. Located at the back of the head.

13. Function of the Medulla… Smallest part of brain Smallest part of brain Controls automatic functions such as Controls automatic functions such as Breathing Breathing Heartbeat Heartbeat Gland secretions Gland secretions Reflexes Reflexes Digestive action Digestive action

14. Function of the Spinal Chord… It carries messages between the brain and the rest of the body. It carries messages between the brain and the rest of the body. It is protected by the backbone. It is protected by the backbone. Spinal chord

15. What are Neurons and what are their function? Nerve Cells Nerve Cells Function is to carry electric messages (impulses). Function is to carry electric messages (impulses). http://serendip.brynmawr.edu/bb/kinser/Nerve7.html

16. Types of Neurons Motor Neurons: carry impulses away from the central nervous system to muscles and glands. Motor Neurons: carry impulses away from the central nervous system to muscles and glands. Sensory Neurons: carry impulses from receptors in sense organs to the central nervous system. Sensory Neurons: carry impulses from receptors in sense organs to the central nervous system. Inter-neurons: connect sensory neurons and motor neurons Inter-neurons: connect sensory neurons and motor neurons

17. Parts of a neuron… http://serendip.brynmawr.edu/bb/kinser/Nerve7.html

18. Parts of Neuron Function… Dendrites: carry message toward the nerve cell body Dendrites: carry message toward the nerve cell body Axon: carry message away form nerve to cell body Axon: carry message away form nerve to cell body

19. Parts of Neuron Function… Synapses: Small space between cells Synapses: Small space between cells Impulses travel across them to connect sensory neurons to motor neurons Impulses travel across them to connect sensory neurons to motor neurons

20. A reflex arc is … the neural pathway that a nerve impulse follows.

21. Click link below to see / learn about a nerve impulse http://learn.genetics.utah.edu/content/addiction/re ward/neurontalk.html http://learn.genetics.utah.edu/content/addiction/re ward/neurontalk.html http://learn.genetics.utah.edu/content/addiction/re ward/neurontalk.html http://learn.genetics.utah.edu/content/addiction/re ward/neurontalk.html

22. Let’s Review what we learned…