Nervous system

нервная система

Большой англо-русский словарь

Nervous system

noun the bodily system that in vertebrates is made up of the brain and spinal cord, nerves, ganglia, and parts of the receptor organs and that receives and interprets stimuli and transmits impulses to the effector organs — compare central nervous system; autonomic nervous system, peripheral nervous system

Merriam-Webster's Collegiate Dictionary