Its job is to support you and provide protection to your nervous system which starts in the brain and runs throughout your body.
(Its job; is; to support you and provide protection to your nervous system) (your nervous system; starts; L:in the brain) (your nervous system; runs; L:throughout your body)
Its job your nervous system your nervous system
is starts runs
to support you and provide protection to your nervous system
L:in the brain
L:throughout your body