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There are three main parts in the whole system:
- brain
- spinal cord
- nerves

If you want to get more precise with the brain (I’ll explain in the functions link)
- cerebrum
- cerebellum
- frontal lobe
- temporal lobe
- parietal lobe
- occipital lobe
- brainstem

If you want to get more precise with the spinal cord (I’ll explain in the functions link)
- gray matter
- white matter
- cranial nerves
- spinal nerves
- cerebrospinal fluid

This is the vocabulary for the words that you don’t know.

Cerebrospinal fluid- this fluid flows in the spinal cord and protects and nourishes the brain and spinal cord. It acts as a shock absorber and collects nutrients from the blood. It floats through the gray matter.

Stimuli- what causes a reactions.

Cerebral- this means of the brain. Like if you are doing something cerebral you are doing something in thought.

Sensory perception- is the ability to perceive the 5 senses.

Voluntary muscle- are the muscles controlled by command.