zhōng​shū​shén​jīng​xì​tǒng

central nervous system

  1. centrum
    The center of a nervous system
  2. nerve
    the bundle of fibers in the body that carries messages between the brain and other parts of the body
  3. system
    A whole composed of parts that work together to perform a function or achieve a goal; a series or group of related things forming a complex whole.