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There are two groups of items. Match the items in group 1 with the items in group 2.

Group 1:
central nervous system
somatic nervous system
autonomic nervous system
sympathetic nervous system
neurons and glial cells
parasympathetic nervous system

Group 2:
calming (rest and digest)
building blocks and structural support
voluntary

involuntary
brain and spinal cord
arousing (fight and flight)