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The Nervous System Agriculture Biology
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What is the nervous system composed of?
Brain Spinal Cord Nerves Sense Organs Receptors
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Fun facts first!
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What’s it made of? 77% Water 10-12% Lipids 8% Protein 1% Carbs
2% Soluble Organics 1% Inorganic Salt
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100 Billion Neurons in the Human Brain
There are… 100 Billion Neurons in the Human Brain
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About The same amount… Of Stars in the Sky
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The left hemisphere has…
186 million more neurons than the right hemisphere.
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750-1000ml of blood flow… through the brain every minute.
This is about 3 full soda cans!
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The brain can stay alive…
4-6 minutes without oxygen!
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The slowest neurons in the brain…
travel at 260 MPH. As “slow” as today’s fastest car! (Clocked at 253 MPH)
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More electrical impulses…
Are generated in one day by a single human brain than all the telephones in the world.
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The human brain has… 70,000 thoughts in an average day.
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Functions of the brain (or noodle)
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Left vs. right Logical Creativity Linguistic Artists Speech Dreamers
Mathematical Linguistic Speech Creativity Imagination Artists Dreamers Visual Spatial
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How does the brain communicate with the rest of the body?
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neurons
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Sensory Neurons Specialized to detect senses Example: pressure or heat
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Motor neurons Impulses that signal muscle contractions… motion.
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interneurons Connect with other neurons.
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