These electrical messages travel through the spinal cord between the brain and the body.

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Your new ahaNerve signals

An action potential is a rapid change in a cell membrane's electrical voltage. Source: Action potential ↗

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39These protective membranes surround the brain and spinal cord.RECALL
Meninges
They form three protective layers
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40Largest organ of the human bodyRECALL
Skin
It protects the body and regulates temperature
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41Longest bone in the bodyRECALL
Femur
The thigh bone
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