The Nervous System - Canton Local Schools

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 • • • •

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

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Epilepsy foundation [Internet]. Landover, MD. [Date accessed 2010 Sept. 27] Available from: http://www.epilepsyfoundation.org/about/

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Kids health [Internet]. 1995-2010. [Date accessed 2010 Sept. 27]. Available from: http://kidshealth.org/kid/talk/qa/taste_buds.html

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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

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Science Week [Internet]. 2004. [Date accessed 2010 Sept. 27]. Available from: http://scienceweek.com/2004/sa0412173.htm

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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

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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 • • • • • • •

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