Which part of the nervous system is outside the brain and spinal cord?

Which part of the nervous system is outside the brain and spinal cord?

[Peripheral  nervous system ]

Which part of the nervous system includes the brain and spinal cord?

[Central  nervous system]

Explanation:

I did this on my online classes and got it right.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.