The Nervous System Instructor: Sarah Jones7 th Grade Science.

The Nervous System

Instructor: Sarah Jones

7th Grade Science

Terms to Learn

• Peripheral nervous system• Central nervous system• Neuron• Nerve• Brain

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

The Nervous System

Two Parts:

Peripheral Nervous System

Central Nervous System

Peripheral Nervous System

• The peripheral nervous system (PNS) is all of the parts of the nervous system except for the brain and the spinal cord.

• Two parts:

– Sensory part (sensory neurons)

– Motor part (motor neuron)

Neuroscience For Kids - Explore the nervous system

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Peripheral Nervous System

Peripheral Nervous System Cont…

Somatic• Somatic nerves are under

your control

• These are the neurons that stimulate skeletal muscles

• Control voluntary movements, such as writing, talking, smiling, or jumping.

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Autonomic• Autonomic nerves do not

need your conscious control.

• Controls body functions that you do not think about, such as digestion and heart rate.– Two parts:

• Sympathetic and parasympathetic nervous system.

Central Nervous System

• The central nervous system (CNS) is the brain and spinal cord.

– The Cerebrum- The largest part of your brain.

– The Cerebellum-Lies beneath the cerebrum.

– The Medulla-Connects to the spinal cord.Your Gross and Cool Body: Nervous System

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Central Nervous System

Central Nervous System

• Brain– is the mass of nerve tissues that is the main control

center of the nervous system.• Spinal Cord

– Made of neurons and bundles of axons– Communicates with your peripheral nervous system– Spinal cord injuries block information to and from the

brain.A Science Odyssey: You Try It: Probe the BrainHolt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Review

• What is the peripheral nervous system?

• What is the central nervous system?

IMCPL Kids' Info Guide: Nervous System

Neuron

Neuron Structure

• A neuron is a specialized nerve cell that transfers messages in the form of fast-moving electrical energy.

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Nerve

Nerve Structure

• A nerve is a collection of nerve fibers (axons) through which impulses travel between the central nervous system and other parts of the body.

Nervous System - Science for Kids!

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Review

What is this? What is this?

Activity1. Sit in a chair with one arm in a

“handshake” position. Your partner should stand facing you, holding a meterstick vertically. The stick should be positioned so that it will fall between your thumb and fingers.

2. Tell your partner to let go of the meterstick without warning you. Catch the stick between your thumb and fingers. Your partner should catch the meterstick if it tips over.

3. Record the number of centimeters that the stick dropped before you caught it. That distance represents your reaction time.

4. Repeat steps 1-3 three times. Calculate the average distance.

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Concept MapInstructor: Sarah Jones Topic: The Nervous SystemName: ____________________ Date: ______________Complete the following map by filling in the squares with the information on the powerpoint:

References

Holt, Rinehart, and Winston, inc. Holt Science & Technology : Life Science. Austin : Holt, Rinehart &Winston, 2006.

Chudder, E.H. (1996-2006). Neuroscience for kids. Retrieved February 16, 2009, from http://faculty.washington.edu/chudler/introb.html

WGBH. (1998). A science odyssey. Retrieved February 16, from http://www.pbs.org/wgbh/aso/tryit/brain/

IMCPL. (2009). IMCPL kids’ info guild : Nervous system. Retrieved February 16,2009, from http://www.imcpl.org/kids/guides/health/nervoussystem.html

Carr, K. (1998-2007). Nervous system-Science for kids! Retrieved February 16, 2009, from http://www.historyforkids.org/scienceforkids/biology/animals/nervous/

Discovery Communications Inc. (2000). Your gross and cool body : Nervous system. Retrieved February 16, 2009, from http://yucky.discovery.com/flash/body/pg000136.html