Nervous SystemSenses what is happening.5th GradeSenses what is happening, decides what todo, and sends the instructions — extremelyfast.MAIN PARTSbrain, spinal cordSignals travel along nerves at up to 120 metres per second.The brain has roughly 86 billion neurons.Reflexes are handled by the spinal cord, before the brain isinvolved.It controls both what you choose and what you never think about.The brain uses about 20% of the body's energy.LOOK FOR ITbrain · spinal cord · nerves · sense organsControls every other system, including ones you never notice.Nervous Systemwww.littleactivity.com

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Science · 5th Grade

Nervous System

Senses what is happening.

How to use it

Point to where this system is on your own body as you read each fact.

Free · print-ready PDF · US Letter and A4

Grade
5th Grade
Ages
10–11
Subject
Science
Pages
1

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