Download The Nervous System - human-body


1.
2.
CNS & PNS



 The neuron has a cell body, the neuron also have
structures called dendrites and axons. Dendrites are
short extensions of cell that receives information from
the other cells. This information is carried away from
the cell body by the axons. Often times the axons
branch off and the tip of each branch is called the axon
terminal.

Poster
Brain:
 Cerebrum- Voluntary movements, sense touch, light,
sound, smell, taste, pain, hot & cold
 Cerebellum- Coordinating voluntary movements such
as skeletal movements.
Spinal Chord- Impulses to and from the brain
(CNS)
Functions cont…
Nerves- Detect changes in environment (inside &
outside of the body), sends information (muscles and
glands), integrates
Neurons:
 Cell Body- Makes neurotransmitters, keeps cell alive
 Dendrites- Receives messages from other cells
 Axon- Carries messages away to other cells
Passage of Impulse
Working w/ Other Systems
You need the nervous system to survive; the system
works with all other systems in the body
 Muscular System- Reacts to messages from the
nervous system (contracts muscles)
 Skeletal System- Reacts/Sends messages from/to
the nervous system (breaking a bone)
 Cardiovascular System- An involuntary change by
nervous system (speeds up/ slows heart rate)
 Respiratory System- An involuntary change by
nervous system (regulates breathing)
Sciatic Nerve

Some long axons are 1m long
Bibliography
 Holt California Life Science
(7th. Grade, Science)
 Claire’s Dad (bio/anatomy teacher)
For fun facts http://answers.yahoo.com/question/index?qid=20090
413152349AAPltcY