The Nervous
System
Our Control
Center
What controls our body functions?
• When you Blink?
• When you breath?
• When you smell a fart?
• When you are hungry?
• Have to go pee?
The Nervous System
•Brain
•Sensory
system
•Anatomy
•Anatomy
•Functions
•Functions
Central
Control
•The Brain
•Cerebral Cortex
(Cerebrum)
•Cerebellum
•Pons
•Medulla
Oblongata
(Brain Stem)
•Spinal Cord
Cerebral Cortex
• Largest part of the brain
• Responsible for:
–Motor Skills, Judgment, Analytical
reasoning
–Emotions, Sensations, Storing data
–Memory, Speech
Cerebellum
•Coordination
•Balance
•Reflex motor activity
Pons
•Consciousness
•Sleep
Medulla Oblongata
•
•
•
•
•
•
•
Brain Stem
Breathing
Pumping the heart
Hunger
Urination
Swallowing
Gag reflex
Nervous Systems
Central Nervous System
Peripheral Nervous System
• Brain
• Spinal Cord
• Retina
• All of the other
sensory nerves
Spinal Cord
• 43 cm long in females / 45 cm in
males
• Connects the peripheral nerves
to the brain
• Nerve “Roots” extend to connect
to certain sections of the body
Spinal Cord
Nerve Cells
•Neurons
•Ganglia
•Connect with
multiple cells
to make up
nerve tissues
Sensory Organs
• Eye
• Ear
• Olfactory Cells
• Taste Buds
Eye
•Cornea
•Lens
•Iris
•Pupil
•Retina
•Optic Nerve
Ear
•Outer ear
•Middle ear
•Inner ear
Olfactory System
Cells that detect odors in the air and sends
chemical messages to the brain
Taste Buds
•Papallea
•Average: 10,000 in
your mouth
•Sends signal to
brain about what
you are tasting
•Bitter
•Sweet
•Sour
•Salty
Papillae
Small hair like cells that taste what you eat
The Nervous System
Problems
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•
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Severe a nerve = loss of signal flow
Compress nerves = impede nerve flow
Epilepsy = Seizures
Cataracts = Clouding of the lens in the
eye
• Otitis media = inner ear infection
The Nervous System
•Controls everything
that our body does
The Nervous
System
•Without it we are
unplugged
Works cited
•
Buzzle.com [Internet]. 2000-2010. [Date accessed 2010 Sept. 27] Available from: http://www.buzzle.com/articles/diagramof-the-brain-and-its-functions.html
•
Epilepsy foundation [Internet]. Landover, MD. [Date accessed 2010 Sept. 27] Available from:
http://www.epilepsyfoundation.org/about/
•
Kids health [Internet]. 1995-2010. [Date accessed 2010 Sept. 27]. Available from:
http://kidshealth.org/kid/talk/qa/taste_buds.html
•
National institute of deafness and other communication disorders [Internet]. Bethesda, MD [Date updated 2010 Sept.; Date
Accessed 2010 Sept. 27]. Available from: http://www.nidcd.nih.gov/health/hearing/earinfections
•
Science Week [Internet]. 2004. [Date accessed 2010 Sept. 27]. Available from: http://scienceweek.com/2004/sa0412173.htm
•
Anatomy, Physiology and pathology of the human eye [Internet]. 1998-2010. [Date accessed 2010 Sept. 27]. Available
from: http://www.tedmontgomery.com/the_eye/index.html
•
The Human eye [Internet]. [Date updated 2009 Nov.; Date accessed 2010 Sept. 27]. Available from:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/V/Vision.html
Works cited - images
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http://blogs.guardian.co.uk/food/taste_buds440.jpg
http://www.brainhealthandpuzzles.com/diagram_of_brain.html
http://www.eu-sol.net/images/copy3_of_images/Tongue.jpg
http://www.freedomscientific.com/images/resources/human_eye.jpg
http://www.holisticeducator.com/Neuron.jpg
http://theveryessence.com/images/Smell.jpg
http://www.zmescience.com/wp-content/uploads/2008/08/the-human-ear.gif