Upper level: s  BODY STRUCTURES

s1  Structures of the nervous system

Lower livel:

• s110  Structure of brain

• s120  Spinal cord and related structures

• s130  Structure of meninges

• s140  Structure of sympathetic nervous system

• s150  Structure of parasympathetic nervous system

• s198  Structure of the nervous system, other specified

• s199  Structure of the nervous system, unspecified

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